Clunky rear passenger side
#1
Junior Member
Thread Starter
Join Date: May 2009
Location: Knoxville, TN.
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Flaming birdie
Engine: lo3-305 tbi
Transmission: Auto
Axle/Gears: stock
Clunky rear passenger side
I have a 91 Bird 305 tbi car, And I finnaly really got it on the road tonight. I had fuel pump issues, and a clogged cat, but I finished that stuff up tonight. On my first "real" drive, I noticed under hard acceleration that there seemed to be a clunking noise coming from the back, it sounded to me like the passenger side, but I could be wrong. Well I stopped and put one foot on the brake and the other on the gas a brake torqued it a little and it clunked pretty bad. I did search and came up with a post about a bad torque arm and mount. Does this sound right to you all? Also, does anyone know where I can get a complete suspension diagram for this car? Thanks in advance!
#2
Junior Member
Join Date: May 2009
Location: north ga
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 iroc
Engine: five-seven L98
Transmission: 700r4
Axle/Gears: 3.27 aussie
Re: Clunky rear passenger side
Check your trans mount, the torque arm runs from the rear end to the back of the trans. under acceleration it keeps the axle from wraping thus putting pressure on the trans. If the trans mount has broken, your trans can be touching the floor giving off awful noises.
#3
Junior Member
Thread Starter
Join Date: May 2009
Location: Knoxville, TN.
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Flaming birdie
Engine: lo3-305 tbi
Transmission: Auto
Axle/Gears: stock
Re: Clunky rear passenger side
Thing is, it really sounds like its coming from the back, instead of underneath me when in the car. It scared the crap out of my girlfriend, she had thoughts of a youtube video I showed her where a camaro drag car broke his rear end completely off coming off the line. What is back there that would pop that way while brake torqing?
#4
Senior Member
Join Date: Dec 2002
Location: Vancouver, B.C.
Posts: 725
Likes: 0
Received 1 Like
on
1 Post
Car: 87 GTA 120,000k, 90 CRX Si
Engine: 5.7 TPI, 1.6L 16 valve SOHC
Transmission: 700r4, 5spd std
Axle/Gears: 3.73
Re: Clunky rear passenger side
drive shaft u joint? but those usually clunk just putting them into gear and starting to roll.
#5
Member
iTrader: (1)
Join Date: Dec 2006
Location: Western Mass
Posts: 346
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1985 Camaro/89 Merkur XR4Ti
Engine: 5.0 305 LG4/2.3 Turbo (180hp/205tq)
Transmission: TH700R4 with Shift Improver Kit/T-9
Axle/Gears: 3.42LT1 Rear/3.64
Re: Clunky rear passenger side
As others will say check the transmission mount, it really sounds like its coming from the rear end. When it happened to me I thought I broke something in back, but it was the tranny mount.
#7
Senior Member
Join Date: Mar 2006
Location: CALI
Posts: 926
Likes: 0
Received 1 Like
on
1 Post
Car: 85' Trans Am !best car ever!
Engine: 305tpi 215hp LB9 two bolt,
Transmission: th-700r4
Axle/Gears: stock (3.27)
Re: Clunky rear passenger side
yo dude, its your torque arm bushing. its a hassle to replace, but doable haha, after the bushing install youll be chirping tires instead of clunking? IF you didnt have a gf, youd get hella looks, couple years back i replaced the tranny bushing and the torque arm mount .. Y? B/c had a bad 2nd gear clunk and both was under twenty bucks and dang, its solid. and reliable..typically, the bushing goes bad, if the rear springs arnt removed properly. CHECK THIS LINK. http://s91.photobucket.com/albums/k3...20replacement/ (you might have to cope and paste the link, trust me it works) and also when you grind off the rivets be careful (i drilled them). (http://store.summitracing.com/egnsea...nresults=false) theres different types of bushings, (82-83) types, then the specific kind, had to do with the torque arm end shape, is it inner lip? outer lip, next, get a energy suspension bushing, and get a prothan tranny mount bushing...use thread lock and two nuts to secure it, because the two nuts prevent backing out. i had both stock bushings go out b4 the swap and man, after the swap, i was back in business, no more 2nd gear clunk. if its further back, it could be the following, bad sway bar bushing, bad lca bushing, bad brake install, chipped tooth on the rear diff, check your upper shock mount to make sure it didnt puncture through the mount. oh and a beer helps and most important, i cant stress this enough, always always use a torque wrench. both are need in this install. INCHES and FOOTs. the values are in the haynes manual. every bolt has a specific torque.!!!!!!!!!!!!!!and also i had to use a c-clamp to install the oversized new bushing.. use polyurethane. torque values are the following. (crossmember to frame bolts 40Ft-lbs)(transmission mount to crossmember 25 ft-lbs)(torque arm bracket to transmission 31 ft-lbs)(torque arm rear mount to diff 100 ft-lbs)
Last edited by transam85dudeman; 05-25-2009 at 01:37 AM.
Trending Topics
#8
Junior Member
Thread Starter
Join Date: May 2009
Location: Knoxville, TN.
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Flaming birdie
Engine: lo3-305 tbi
Transmission: Auto
Axle/Gears: stock
Re: Clunky rear passenger side
wow, thats alot of info. Do you drink alot of coffee? J/K.. Thanks alot for the help.
#10
Junior Member
Thread Starter
Join Date: May 2009
Location: Knoxville, TN.
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Flaming birdie
Engine: lo3-305 tbi
Transmission: Auto
Axle/Gears: stock
Re: Clunky rear passenger side
Let me see, Heinekin and Corona? Good stuff. Nice too know you are a multi-cultural alcohol drinker. Bottoms up!
#11
Junior Member
Join Date: May 2009
Location: north ga
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 iroc
Engine: five-seven L98
Transmission: 700r4
Axle/Gears: 3.27 aussie
Re: Clunky rear passenger side
In the middle of my 3rd great american bud light myself. But still I think its a trans mount or a torque arm bushing.
#12
Junior Member
Join Date: Jun 2009
Location: new jersey
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird
Engine: 305
Transmission: 700r4 w/ kit
Re: Clunky rear passenger side
i had a similar problem, except my car had a small lean to the right look. turns out the bottom bolt on the rear linkage stabilizer arm snapped. everytime i hit a bump it was straight metal on metal (loud as hell) . i installed new linkage bolts and works like a charm. no noise or lean. maybe its something like that
#13
Junior Member
Join Date: Oct 2009
Location: NY
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Car: 83 camaro base modle fac. no a/c
Engine: 327, cam, heads, holley 600
Transmission: T-5 with Mechanical clutch linkage.
Axle/Gears: 3.42 posi
Re: Clunky rear passenger side
wild guess but try the rear shock mount behind the rear seat. i blew mine out and the shock just floats and it would make a pretty big clunking noise. idk i could be wrong< just thowing out another possiablity
Thread
Thread Starter
Forum
Replies
Last Post