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!
Sponsored by:
Sponsored by: CARiD

car thumps on take off

Old Aug 8, 2008 | 03:06 PM
  #1  
87_355ci_Camaro's Avatar
Thread Starter
Member
iTrader: (2)
 
Joined: Sep 2006
Posts: 240
Likes: 0
From: pa
Car: 86 Iroc-Z
Engine: 310ci soon to be 355ci
Transmission: built 700r4
Axle/Gears: I think 3.08s
car thumps on take off

Ok my 86 iroc just started to make this clunk when I step on the gas I was thinking it was a torque arm mount or trans mount. Does anyone have an idea of what it may be thanks. Also were would I get the kit to relocate the arm to the crossmember instead of the trans?
Reply
Old Aug 8, 2008 | 04:26 PM
  #2  
86z/92rs's Avatar
Senior Member
 
Joined: Dec 1999
Posts: 770
Likes: 0
From: San Antonio, TX
Car: 86Z/92 RS Camaro
Engine: 357 vortec finished. need tuning
Transmission: Still works
Axle/Gears: need 3.73
Re: car thumps on take off

Have you checked under the car to determine if it was the tranny mount? More than likely is the trans mount. As far as "relocate the arm to the crossmember instead of the trans?" I am not aware you could unless you fabricate one yourself.
Reply
Old Aug 8, 2008 | 04:32 PM
  #3  
87_355ci_Camaro's Avatar
Thread Starter
Member
iTrader: (2)
 
Joined: Sep 2006
Posts: 240
Likes: 0
From: pa
Car: 86 Iroc-Z
Engine: 310ci soon to be 355ci
Transmission: built 700r4
Axle/Gears: I think 3.08s
Re: car thumps on take off

Nah haven't had a chance to yet. It only does it wen I step on it hard otherwise the car drives and shifts fine. I heard there was a kit if I have to weld one on I will.
Reply
Old Aug 8, 2008 | 04:34 PM
  #4  
//<86TA>\\'s Avatar
Supreme Member
15 Year Member
iTrader: (15)
 
Joined: Aug 2006
Posts: 12,812
Likes: 110
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: car thumps on take off

its on of the two mounts, i would say trans mount

you can get crossmembermounted torque arms from UMI, BMR, Spohn, Jegster, and Moser sells a setup too, though its a complete system with rear and everything $$$$
Reply
Old Aug 8, 2008 | 04:43 PM
  #5  
87_355ci_Camaro's Avatar
Thread Starter
Member
iTrader: (2)
 
Joined: Sep 2006
Posts: 240
Likes: 0
From: pa
Car: 86 Iroc-Z
Engine: 310ci soon to be 355ci
Transmission: built 700r4
Axle/Gears: I think 3.08s
Re: car thumps on take off

I don't mind makin one. Ill replace the tranny mount. Do you think its just better to go solid motor and tranny mounts?
Reply
Old Aug 9, 2008 | 06:33 AM
  #6  
Damon's Avatar
Supreme Member
 
Joined: Sep 1999
Posts: 7,072
Likes: 13
From: Philly, PA
Re: car thumps on take off

Checking the trans mount is easy- just push up hard on the tailshaft of the transmission. If it's shot you'll see it's probably ripped totally in half and the only thing holding it together is the weight of the transmission. Torque arm bushings you can just use your eyeballs.

The Energy Suspension poly trans mount works well. It's got interlocking metal parts inside it that prevent ripping it in half, which factory mounts don't have. Once installed you'll never have that problem again.
Reply
Old Aug 9, 2008 | 02:10 PM
  #7  
//<86TA>\\'s Avatar
Supreme Member
15 Year Member
iTrader: (15)
 
Joined: Aug 2006
Posts: 12,812
Likes: 110
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: car thumps on take off

solid motor mounts are up to you, but DO NOT use a solid trans mount
Reply
Old Aug 9, 2008 | 03:39 PM
  #8  
drknow90rs_ss@y's Avatar
Supreme Member
iTrader: (3)
 
Joined: Apr 2008
Posts: 3,002
Likes: 64
From: Wittman,Az
Car: 86 IROC-Z, '71 RS
Engine: 305 TPI/ 350
Transmission: 700R4/TH350
Re: car thumps on take off

Trans mount for sure. Jegs or summit has the torque arm relocation bracket you are looking for. If this is a street car, I wouldnt put in solid mounts. The vibration and rattles will drive you nuts!!!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Frozer!!!
Camaros for Sale
35
Jan 19, 2024 04:55 PM
Reddeath210
Firebirds for Sale
14
Oct 6, 2015 08:20 AM
Linson
Auto Detailing and Appearance
40
Aug 21, 2015 02:12 PM
kyleb24
Camaros for Sale
2
Aug 15, 2015 08:24 AM
bryan623
Auto Detailing and Appearance
2
Aug 10, 2015 11:33 AM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 07:52 AM.