Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

what did you do to your thirdgen today?

Thread Tools
 
Search this Thread
 
Old 05-03-2018, 07:33 PM
  #401  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Yes Sir, I saw that I might have to get the whole enchilada. I have no problem with that, but I want to see if I can just get the plastic. I have a replacement mirror all set to go. I old one was scratched up. Had to go.
Old 05-03-2018, 07:37 PM
  #402  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

I'm gonna try some silicone spray. See it that makes it pop back in any easier. I hope, because I want to drive it again. Yes, the mirrors are powered.
Old 05-03-2018, 08:57 PM
  #403  
Member
iTrader: (4)
 
SirReveller's Avatar
 
Join Date: Aug 2017
Location: Toronto, ON
Posts: 477
Received 40 Likes on 31 Posts
Car: '89 'ROC
Engine: 5.7L
Re: what did you do to your thirdgen today?

Bangin. Good luck.
Old 05-07-2018, 04:31 PM
  #404  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Grabbed the whole mirror from Hawks Motorsports. Was having no luck just getting the plastic. Are the motors interchangeable from side to side? I got a driver's side that I'm scarfing the plastic & mirror glass if it's pristine. Otherwise, nos glass is ready to go.
Old 05-07-2018, 04:40 PM
  #405  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?



The SEM trim black is a perfect match. I Scuffed up the tabs good with a green Scotch Brite pad. Then used the self etching primer, which is black as well. See for yourself. I have to give thanks to Chris & his '89 red iroc build on Facebook for the suggestion.
Old 05-07-2018, 05:51 PM
  #406  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Facebook Post
Old 05-07-2018, 09:28 PM
  #407  
Moderator

iTrader: (3)
 
Abubaca's Avatar
 
Join Date: Feb 2001
Location: JAMESTOWN, NC
Posts: 8,366
Received 348 Likes on 275 Posts
Car: 1988 Iroc
Engine: L98 350
Transmission: 700R4
Axle/Gears: Hawks 8.8 - 3.73
Re: what did you do to your thirdgen today?



...and good job!!!!!!
Old 05-07-2018, 09:31 PM
  #408  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

You're welcome & thank you. Hey, wait a minute, did I get that backwards?
Old 05-12-2018, 12:10 PM
  #409  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Success on the 2nd attempt to remove the plastic backing & mirror from a donor assembly. The factory used 3 dollops of adhesive to mount the glass to the backing. The new replacement glass has 2 strips of tape.


Had to pirate one of the locator things from the cracked one.



New glass ready to go in after an alcohol bath is given to the plastic. Want it clean for good tape adhesion.



Sacrificial scratched glass.
Old 05-14-2018, 11:05 PM
  #410  
On Probation
iTrader: (8)
 
3rdgenparts's Avatar
 
Join Date: Jan 2002
Location: Dallas
Posts: 1,434
Likes: 0
Received 6 Likes on 4 Posts
Car: 1982 Trans Am KITT Replica
Engine: LU5 305 CROSSFIRE
Transmission: TH-350
Axle/Gears: Limited Slip 3:23
Re: what did you do to your thirdgen today?

I added some Rislone ZINC additive and stared at it for 5 minutes lol


Dave




Last edited by 3rdgenparts; 05-14-2018 at 11:09 PM.
Old 05-15-2018, 12:21 AM
  #411  
Supreme Member

iTrader: (34)
 
84redta's Avatar
 
Join Date: Jul 2002
Location: Stamford, New York
Posts: 1,983
Likes: 0
Received 6 Likes on 3 Posts
Car: 80 SE/TTA;88 T/A GTA;86 T/A
Engine: 4.9L Turbo; LT1; empty
Transmission: TH350; T56; empty
Axle/Gears: 3:23 disk; 4:10 disk ; 3.42 disk
Re: what did you do to your thirdgen today?

I gutted my next build :-)

Next need to figure out the blasting situation...probably should have had an idea before getting to this point lol. Oh well.
Attached Thumbnails what did you do to your thirdgen today?-20180513_225101.jpg   what did you do to your thirdgen today?-20180508_194956.jpg  
Old 05-15-2018, 06:57 PM
  #412  
Junior Member
 
Boom's Avatar
 
Join Date: May 2018
Location: Tomah, WI
Posts: 55
Received 5 Likes on 4 Posts
Car: 1986 Iroc
Engine: 383
Transmission: Auto
Re: what did you do to your thirdgen today?

Just got my third gen. Can't wait to mod it some. Have to sort out the exhaust first.

by https://www.flickr.com/photos/62639173@N03/, on Flickr

by https://www.flickr.com/photos/62639173@N03/, on Flickr
Old 05-15-2018, 07:49 PM
  #413  
Supreme Member
iTrader: (1)
 
88IROCvertZ's Avatar
 
Join Date: Mar 2016
Location: New England
Posts: 2,406
Received 190 Likes on 128 Posts
Car: 1988 IROC Z Convertible
Engine: 305 TPI (LB9)
Transmission: 700 R4
Axle/Gears: G80 GU2
Re: what did you do to your thirdgen today?

Looks sweet Boom! Congrats on the thirdgen!
Old 05-15-2018, 08:14 PM
  #414  
Junior Member
 
Boom's Avatar
 
Join Date: May 2018
Location: Tomah, WI
Posts: 55
Received 5 Likes on 4 Posts
Car: 1986 Iroc
Engine: 383
Transmission: Auto
Re: what did you do to your thirdgen today?

Originally Posted by 88IROCvertZ
Looks sweet Boom! Congrats on the thirdgen!
Thanks! I've always wanted a clean third gen and now I have one.

I'm used to restoring/working on first gen Mustangs (64-70) and I gotta say the aftermarket supprt for third gen parts is alot smaller. You can literally order every single nut/bolt/bracket/widget for those Mustangs.

Last edited by Boom; 05-15-2018 at 08:54 PM.
Old 05-15-2018, 09:24 PM
  #415  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Hey Boom, if you ever want to sell your '88-'90 wheels for the correct style, let me know. I will pay your price.
Old 05-18-2018, 07:30 PM
  #416  
Junior Member
 
Boom's Avatar
 
Join Date: May 2018
Location: Tomah, WI
Posts: 55
Received 5 Likes on 4 Posts
Car: 1986 Iroc
Engine: 383
Transmission: Auto
Re: what did you do to your thirdgen today?

Originally Posted by 2 birds 1 Z
Hey Boom, if you ever want to sell your '88-'90 wheels for the correct style, let me know. I will pay your price.
Thanks for the offer. I'll have to look at the correct style for 86 and see. Still learning about these cars and SBCs.

Been working on fixing a few odds and ends. I had a leak from the fuel pump. Turns out whoever installed it didn't use a gasket/RTV or anything. I cleaned it up and installed the proper gaskets. So far it seems to have fixed the leaking.

My battery is just chilling here in the corner, it also looks like a battery could go on the drivers side. Which side is correct? Either way I need to get the mounting hardware to secure it.

by https://www.flickr.com/photos/62639173@N03/, on Flickr

I had to pull the driver's valve cover off because some knobgoblin installed it upside down (Edelbrock script). Found out I have to remove the wiper motor to get the cover off. Looks pretty clean under there though. Installed a permadry gasket when I put the cover back on.

by https://www.flickr.com/photos/62639173@N03/, on Flickr


EDIT: Not sure why my pics are double posting, it only shows once in the edit box.
Old 05-18-2018, 08:17 PM
  #417  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Brett, here is a link for the correct wheels for your '86. They are correct for '85-'87.https://www.google.com/search?q=85%3...RZ9DUYQsAQI8gE
Old 05-18-2018, 08:22 PM
  #418  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

This is what came on your car from the factory.
Old 05-28-2018, 11:41 PM
  #419  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Ordered a nice & shiny new driveshaft to replace the rusted one that’s on the car. It came from the NE, so I’m figuring it saw some snow & salt.
Old 05-30-2018, 09:51 PM
  #420  
Member

 
punzak9's Avatar
 
Join Date: May 2010
Location: Pittsburgh
Posts: 345
Received 12 Likes on 10 Posts
Car: 1990 Firebird Formula
Engine: 305 V8
Re: what did you do to your thirdgen today?

Had to change the thermostat in the Formula, so after that I decided to wipe everything down real quick and give it a little cleaning.

Old 05-31-2018, 07:02 PM
  #421  
Senior Member
Thread Starter
 
Evilokc's Avatar
 
Join Date: Apr 2016
Posts: 713
Received 40 Likes on 31 Posts
Car: 1991 base firebird
Engine: tbi 305
Transmission: 700r4
Re: what did you do to your thirdgen today?

haven't posted in a while. I'm not really working on anything. ive just been driving the wheels off of it. I'm working at a location that's putting about 85 miles a day on it. 85 miles at 80mph is nice. ive known for a while that my suspension needs some love. i heard a ball joint clicking yesterday. guess that next.
Old 06-03-2018, 08:04 PM
  #422  
Supreme Member

iTrader: (11)
 
DynoDave43's Avatar
 
Join Date: Aug 2013
Location: MICHIGAN
Posts: 4,637
Received 751 Likes on 577 Posts
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: what did you do to your thirdgen today?

Originally Posted by punzak9
Had to change the thermostat in the Formula, so after that I decided to wipe everything down real quick and give it a little cleaning.


Looks great!
Old 06-05-2018, 09:56 PM
  #423  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Well, I finally got the driver's side mirror replaced. Before I taped the glass to the plastic, I generously applied silicone spray to the plus sign on the back of the plastic as well as the clips that it plugs into. Lined up the screw looking locators & pressed hard. Nothing. Took my finger tips & pecked it hard. Success. Then I doused the plastic face with alcohol in prep for good tape adhesion. New glass fits perfectly, like factory glass.
Old 06-05-2018, 10:01 PM
  #424  
Senior Member
 
Jbuchanan's Avatar
 
Join Date: Mar 2017
Location: Sweet home Alabama
Posts: 528
Received 44 Likes on 20 Posts
Car: 1987 GTA
Engine: 5.0
Transmission: Automatic
Re: what did you do to your thirdgen today?



Took my ttops out for a 12 minute ride home but man I looked cool for 12 minutes!<br/>
Old 06-05-2018, 10:23 PM
  #425  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Custom made fit to order sunscreen for my '89 Iroc fits like a glove. Thicker than the cheap ones you can get from the parts store, that don't fit real good.


Covercraft exact fit sun shade.

Last edited by 2 birds 1 Z; 06-05-2018 at 10:25 PM. Reason: Added picture
Old 06-06-2018, 09:40 PM
  #426  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Got my new driveshaft for the Iroc today. Have to get the car up in the air to do the swap. Stock shaft is big time rusty, it was a northern car. While under the car, I will take an inventory on all the rusty pieces.
Old 06-09-2018, 12:13 AM
  #427  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

While looking under the car in prep for the driveshaft swap Saturday, I noticed I now have a small oil leak. Gotta try to find the source & nip it in the bud.
Old 06-10-2018, 03:35 PM
  #428  
Junior Member

 
Toxicant's Avatar
 
Join Date: Feb 2012
Location: St Marys,GA
Posts: 55
Received 2 Likes on 2 Posts
Car: 1988 Firebird Formula
Engine: 350
Transmission: T-5
Axle/Gears: 3.23 4th Gen w/ powertrax locker
Re: what did you do to your thirdgen today?

Finished up repairing my trunk pan.




Old 06-10-2018, 03:48 PM
  #429  
Junior Member
 
Boom's Avatar
 
Join Date: May 2018
Location: Tomah, WI
Posts: 55
Received 5 Likes on 4 Posts
Car: 1986 Iroc
Engine: 383
Transmission: Auto
Re: what did you do to your thirdgen today?

Finished my LS1 fan install. Works much better then the old single fan.
Old 07-22-2018, 09:55 PM
  #430  
Senior Member
Thread Starter
 
Evilokc's Avatar
 
Join Date: Apr 2016
Posts: 713
Received 40 Likes on 31 Posts
Car: 1991 base firebird
Engine: tbi 305
Transmission: 700r4
Re: what did you do to your thirdgen today?

im making a list of mechanical things to start working on. I still haven't fixed that ball joint.. drive the thing constantly though. hard to take it apart when its moving all the time. did they make any upgraded a/c fans? mine works on all setting but it really seems like it could blow harder.
Old 07-23-2018, 11:05 PM
  #431  
Member
 
2 birds 1 Z's Avatar
 
Join Date: Aug 2017
Posts: 193
Likes: 0
Received 16 Likes on 9 Posts
Car: 2002 Firehawk & ws6 1989 Iroc Z
Engine: All 3 have 350s
Transmission: Birds manual Iroc auto
Axle/Gears: TAs 342 & Iroc who knows?
Re: what did you do to your thirdgen today?

Per thread title, I looked at pics of mine. Can't appreciate it's full beauty sitting in the garage.
Old 07-24-2018, 06:16 AM
  #432  
Moderator

 
Vader's Avatar
 
Join Date: Jan 2000
Posts: 19,349
Received 216 Likes on 177 Posts
Re: what did you do to your thirdgen today?

Charged the battery some more.
Old 08-06-2018, 07:45 PM
  #433  
Junior Member
 
88IROC-USA's Avatar
 
Join Date: May 2018
Location: Oklahoma
Posts: 30
Received 0 Likes on 0 Posts
Car: 1988 IROC-Z
Engine: 350 TPI
Transmission: 700-R4
Axle/Gears: 2.77 Positrac
Re: what did you do to your thirdgen today?

Two weeks and two (guaranteed) salvage compressors later, a manifold assembly, a high pressure switch, a low pressure line, a "retrofit kit" (for 134A conversion) annnd a new dryer with orifice tube later.....the IROC has A/C!
I spent about $260. 👍


All we need now is moar Fan Speed LOL!
Old 08-06-2018, 08:29 PM
  #434  
Senior Member
 
Jbuchanan's Avatar
 
Join Date: Mar 2017
Location: Sweet home Alabama
Posts: 528
Received 44 Likes on 20 Posts
Car: 1987 GTA
Engine: 5.0
Transmission: Automatic
Re: what did you do to your thirdgen today?

I roasted another set of rear tires
Old 08-07-2018, 07:47 AM
  #435  
Supreme Member

iTrader: (2)
 
dmccain's Avatar
 
Join Date: Mar 2014
Location: South Ms
Posts: 4,422
Received 721 Likes on 490 Posts
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: what did you do to your thirdgen today?

Let my 14 yr old change distributor cap, rotor, and most of my plug wires. Saturday coming in from a cruise in the car had developed a bad miss. Wound up being a plug wire had came loose from the loom and burnt up on the exhaust manifold. My son loves being involved in working on this car. He also changed a few hydraulic lines on my tractor I was very proud of him he will be a much better mechanic than I am that's for sure.
Old 08-07-2018, 05:02 PM
  #436  
Senior Member
iTrader: (1)
 
Galaxie500XL's Avatar
 
Join Date: Sep 2015
Location: Knoxville, TN
Posts: 679
Received 15 Likes on 14 Posts
Car: 1988 IROC-Z
Engine: 350 TPI
Transmission: T56 swap ongoing
Axle/Gears: 2.77 9-bolt Posi
Re: what did you do to your thirdgen today?

Dropped the T56 I'm swapping into my IROC off at Pro-Force Performance for a full rebuild, and bought a bunch of T56 stuff from Summit Racing.

I'm anticipating doing the swap in about a month.
Old 08-07-2018, 07:03 PM
  #437  
Member

 
nhgator's Avatar
 
Join Date: Jun 2012
Location: Concord N.H.
Posts: 375
Received 23 Likes on 14 Posts
Car: 1985 T/A
Re: what did you do to your thirdgen today?

Adjusted the choke a little on my new Sean Murphy Induction Quadrajet and drove to the parts store to get calipers for the daughters Mitsubishi Outlander.
Old 08-07-2018, 07:31 PM
  #438  
Supreme Member

iTrader: (3)
 
TylerSteez's Avatar
 
Join Date: May 2013
Location: CT
Posts: 1,393
Received 54 Likes on 38 Posts
Car: 86 Trans Am WS6
Engine: 383 stroker
Transmission: Dynamic Racing Reverse Manual 700r4
Axle/Gears: 9 Bolt 3.45
Re: what did you do to your thirdgen today?

I finally got the timing close enough to fire my 383 stroker and have it idle on its own, had to shut it down after a few seconds because its open headers currently and my cry baby neighbors were outside. started hearing a drip sound from underneath the car and noticed a bunch of coolant dripping out of the torque converter dust cover. after twenty minutes of thinking it was a freeze plug behind the flex plate and wanting to die I was able to trace it to the temp sender unit in the head, It was hand tight lol.

also noticed the trans cooler lines are leaking where they go into the trans, they're brand new braided stainless ones from summit so I'll have to check the adapter fittings. does anyone use any kind of thread sealant on these? I understand not to use them on the flared connecting but what about the pipe thread connections?
Old 08-19-2018, 10:41 PM
  #439  
Senior Member
Thread Starter
 
Evilokc's Avatar
 
Join Date: Apr 2016
Posts: 713
Received 40 Likes on 31 Posts
Car: 1991 base firebird
Engine: tbi 305
Transmission: 700r4
Re: what did you do to your thirdgen today?

I noticed there was a tapping when I turned. it was coming from the rear of the car. it sounded like something hanging and swing back and forth and hitting the inner fender.i popped the hatch and opened the covers to see if there was something inside that was doing it. nope. climbed under it and didn't see anything. finally I pulled the inner panel out all the way and looked down into the rear quarter. it was full of water ( its been raining for weeks here). there was a small reflector floating in it. the reflector was tapping up against the quarter when I turned. I didn't see a drain hole. I got my drill out and drilled a drain and watched about 1/2 a gallon drain onto my driveway. so fixed that! im driving a lot more than I was in the last year. I think the extra miles are taking their toll on my already worn out suspension. im planning a pretty extensive suspension rebuild/ upgrade but im not sure when it will happen. hopefully before stuff starts falling off.
Old 08-22-2018, 09:17 PM
  #440  
Senior Member
Thread Starter
 
Evilokc's Avatar
 
Join Date: Apr 2016
Posts: 713
Received 40 Likes on 31 Posts
Car: 1991 base firebird
Engine: tbi 305
Transmission: 700r4
Re: what did you do to your thirdgen today?

I went to orileys today to get a new transmission mount. I asked for one made in the U.S.A because ive read people have had issues with inferior Korean rubber. they didn't have one made in the U.S.A so im going to order on eonline
Old 08-24-2018, 06:27 PM
  #441  
Member
iTrader: (1)
 
rburrow87's Avatar
 
Join Date: Feb 2016
Location: San Diego, CA
Posts: 154
Received 14 Likes on 10 Posts
Car: 1975 Pontiac Firebird Formula 400
Engine: SBC 350 w/Pro-Flo 4
Transmission: M29 T56
Axle/Gears: Stock 10 bolt w/3.42 and new Auburn
Re: what did you do to your thirdgen today?

Did this over the weekend and a couple of days ago, but I finally fixed the driveline vibration! Ordered a "T-56 specific" aluminum 3.5" shaft from Midwest Chassis and had to wait a while to get it (yokes were backordered), but it was worth it. I was previously using a 4th gen aluminum shaft but it would start vibrating at 70 MPH and then buzz the car apart at 75+. Original steel one was way worse and started at lower speeds. Tried a UMI adjustable torque arm to set the pinion angle parallel with the powertrain, flipped the driveshaft a few times on the pinion yoke, tried both poly and rubber trans mounts, and none of that really helped. Trans was rebuilt for other issues and that didn't help either.

The final setup with no noticeable vibration is the new driveshaft, setting the pinion/trans angles to a "broken back" or W configuration, and going back to the rubber trans mount. I ran it up to 85 or so and I couldn't feel any driveshaft vibrations, just the preexisting wheel/tire chassis shake.
Old 08-24-2018, 06:53 PM
  #442  
Supreme Member

 
ULTM8Z's Avatar
 
Join Date: Jan 2003
Posts: 4,035
Received 193 Likes on 167 Posts
Re: what did you do to your thirdgen today?

not a third gen, but I upgraded my 2nd gen to an AD244 alternator...

https://www.thirdgen.org/forums/electronics/755380-ad244-conversion-took-plunge.html
Old 08-24-2018, 07:04 PM
  #443  
Supreme Member

iTrader: (2)
 
dmccain's Avatar
 
Join Date: Mar 2014
Location: South Ms
Posts: 4,422
Received 721 Likes on 490 Posts
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: what did you do to your thirdgen today?

Drive it like I stole it on my way to look at a C4. Which was junk- a no go.
Old 08-25-2018, 08:55 PM
  #444  
Member
iTrader: (1)
 
rburrow87's Avatar
 
Join Date: Feb 2016
Location: San Diego, CA
Posts: 154
Received 14 Likes on 10 Posts
Car: 1975 Pontiac Firebird Formula 400
Engine: SBC 350 w/Pro-Flo 4
Transmission: M29 T56
Axle/Gears: Stock 10 bolt w/3.42 and new Auburn
Re: what did you do to your thirdgen today?

Pulled one of the heads to investigate a one cylinder low compression issue... looks like a botched valve job. The guide and/or valve stem is pretty sloppy now too. Just built this engine in April this year. I see signs of the exhaust valve to the right beginning to do the same thing.

what did you do to your thirdgen today?-8ztcl7k.jpg

what did you do to your thirdgen today?-cltvg07.jpg

what did you do to your thirdgen today?-y4xiprz.jpg

what did you do to your thirdgen today?-cprtd7w.jpg
Old 08-25-2018, 09:04 PM
  #445  
Member
iTrader: (4)
 
SirReveller's Avatar
 
Join Date: Aug 2017
Location: Toronto, ON
Posts: 477
Received 40 Likes on 31 Posts
Car: '89 'ROC
Engine: 5.7L
Re: what did you do to your thirdgen today?

Originally Posted by dmccain
Drive it like I stole it on my way to look at a C4. Which was junk- a no go.
That’s funny man- ditto a few weeks ago. Been gunning for a 6spd with the sawblades’n’LT1 but without the PSairbag for awhile. So ‘92/93. This got snagged right before I showed up. Anyway not the forum for this :P ...

Old 08-26-2018, 06:24 PM
  #446  
Junior Member
 
88IROC-USA's Avatar
 
Join Date: May 2018
Location: Oklahoma
Posts: 30
Received 0 Likes on 0 Posts
Car: 1988 IROC-Z
Engine: 350 TPI
Transmission: 700-R4
Axle/Gears: 2.77 Positrac
Re: what did you do to your thirdgen today?


I'm lookin to wrap up the intake RnR.

Last edited by 88IROC-USA; 08-26-2018 at 06:41 PM.
Old 08-26-2018, 07:05 PM
  #447  
Junior Member
 
Boom's Avatar
 
Join Date: May 2018
Location: Tomah, WI
Posts: 55
Received 5 Likes on 4 Posts
Car: 1986 Iroc
Engine: 383
Transmission: Auto
Re: what did you do to your thirdgen today?

Had to replace the starter since the cone broke off somehow. I went with a Proformance starter, much easier to get in place with headers.
Old 08-26-2018, 07:16 PM
  #448  
Junior Member
 
DirtyDan's Avatar
 
Join Date: Aug 2018
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
Car: 1992 Camaro RS
Engine: 305
Re: what did you do to your thirdgen today?

Removed front fenders, hood, bumper and side skirts.
Old 08-26-2018, 07:59 PM
  #449  
Senior Member
Thread Starter
 
Evilokc's Avatar
 
Join Date: Apr 2016
Posts: 713
Received 40 Likes on 31 Posts
Car: 1991 base firebird
Engine: tbi 305
Transmission: 700r4
Re: what did you do to your thirdgen today?

Originally Posted by DirtyDan
Removed front fenders, hood, bumper and side skirts.
why? what you up to man?

Old 08-26-2018, 08:03 PM
  #450  
Junior Member
 
DirtyDan's Avatar
 
Join Date: Aug 2018
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
Car: 1992 Camaro RS
Engine: 305
Re: what did you do to your thirdgen today?

Originally Posted by Evilokc
why? what you up to man?
Finally getting around to working on my car. All the panels needed replacing anyway so took them off so I could get to everything easier. Gonna have to work on a few things but not sure what yet.


Quick Reply: what did you do to your thirdgen today?



All times are GMT -5. The time now is 08:45 AM.