Jegster TA driveshaft interference
Thread Starter
Joined: Jun 2005
Posts: 8,122
Likes: 362
From: NC
Car: 91 Trans Am
Jegster TA driveshaft interference
Anyone have issues with driveshaft clearance with the jegster TA?
The front mount in the trans tunnel seems to be out into the DS pathway slightly
Anyone got pics of the area?
The front mount in the trans tunnel seems to be out into the DS pathway slightly
Anyone got pics of the area?
Re: Jegster TA driveshaft interference
I do not have a picture of one, but I have seen one installed on a 3rd gen and there is plenty of clearance still for driveshaft room.
Joined: Sep 2010
Posts: 1,626
Likes: 46
From: Double Bratville
Car: '89 Formula
Engine: LS2
Transmission: 4L65E
Axle/Gears: MW 3.42 12 Bolt
Re: Jegster TA driveshaft interference
a few pics (4th gen), here: http://ls1tech.com/forums/suspension...-finished.html
Thread Starter
Joined: Jun 2005
Posts: 8,122
Likes: 362
From: NC
Car: 91 Trans Am
Re: Jegster TA driveshaft interference
Just looking at the pics, lowering my trans may fix the issue. Ill snaps some pics tonight. Good thing I hadnt started building the crossmember yet
Initial concerns were based on a string stretched from output shaft CL to axle yoke CL, with the axle jacked up approx ride height. There was approx 1.125" from string to TA mount bolt head, really raising some eyebrows
Initial concerns were based on a string stretched from output shaft CL to axle yoke CL, with the axle jacked up approx ride height. There was approx 1.125" from string to TA mount bolt head, really raising some eyebrows
Joined: Nov 2002
Posts: 491
Likes: 1
From: Wichita, KS
Car: 88 Trans Am GTA
Engine: 5.1L Gen III
Transmission: T56
Axle/Gears: 3.70
Re: Jegster TA driveshaft interference
I didn't have any issues with the front of the saddle or the mount lug, but I did have issues with the back of the saddle interfering. This is with a 3" PST driveshaft and quite a bit more bump clearance (maybe 1.5" more) than possible stock.
Thread Starter
Joined: Jun 2005
Posts: 8,122
Likes: 362
From: NC
Car: 91 Trans Am
Re: Jegster TA driveshaft interference
Figured out my issue
Trans and axle had too much bias to the drivers side. Adjusted more to the center and have tons of clearance now
Not sure what whoever designed this thing was thinking when they chose the hole placement for the tunnel bolts. Several have to be flipped or they will scrub the TA as it travels. One or two Ill have to redrill
Trans and axle had too much bias to the drivers side. Adjusted more to the center and have tons of clearance now
Not sure what whoever designed this thing was thinking when they chose the hole placement for the tunnel bolts. Several have to be flipped or they will scrub the TA as it travels. One or two Ill have to redrill
Senior Member




Joined: Jun 2001
Posts: 922
Likes: 33
From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
Re: Jegster TA driveshaft interference
pocket, i'm running into issues with my 3.5" aluminum shaft. the tolerance is a little too tight for me to feel comfortable running it. i didn't have any issues with the ta hitting any of the bolts, however.
did you finish your new 8.8 yet?
did you finish your new 8.8 yet?
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Thread Starter
Joined: Jun 2005
Posts: 8,122
Likes: 362
From: NC
Car: 91 Trans Am
Re: Jegster TA driveshaft interference
Yes, its whats causing the issue. Apparently my mount wasnt welded in the proper location (my fault)
Took an adj panhard and tweaked it some, then the axle could be adjusted center and the TA mount cleared completely. I based it around a 3" DS though, the extra 1/4" radius would make it pretty tight for your 3.5". If your tires/exhaust have enough room, try to bias the axle to the pass side some for more clearance. Might work, might not
If you dont have an adj panhard, then remove yours and shift the axle over until it clears the DS. Measure bolt hole to bolt hole and compare to the stock adj panhard hole to hole length. An adj panhard gives approx 1/2" +/- from stock
Took an adj panhard and tweaked it some, then the axle could be adjusted center and the TA mount cleared completely. I based it around a 3" DS though, the extra 1/4" radius would make it pretty tight for your 3.5". If your tires/exhaust have enough room, try to bias the axle to the pass side some for more clearance. Might work, might not
If you dont have an adj panhard, then remove yours and shift the axle over until it clears the DS. Measure bolt hole to bolt hole and compare to the stock adj panhard hole to hole length. An adj panhard gives approx 1/2" +/- from stock
Senior Member




Joined: Jun 2001
Posts: 922
Likes: 33
From: Kansas
Car: 91 Z28
Engine: 6.0L LQ9
Transmission: T56
Axle/Gears: Dana 44 3.92
Re: Jegster TA driveshaft interference
Yes, its whats causing the issue. Apparently my mount wasnt welded in the proper location (my fault)
Took an adj panhard and tweaked it some, then the axle could be adjusted center and the TA mount cleared completely. I based it around a 3" DS though, the extra 1/4" radius would make it pretty tight for your 3.5". If your tires/exhaust have enough room, try to bias the axle to the pass side some for more clearance. Might work, might not
If you dont have an adj panhard, then remove yours and shift the axle over until it clears the DS. Measure bolt hole to bolt hole and compare to the stock adj panhard hole to hole length. An adj panhard gives approx 1/2" +/- from stock
Took an adj panhard and tweaked it some, then the axle could be adjusted center and the TA mount cleared completely. I based it around a 3" DS though, the extra 1/4" radius would make it pretty tight for your 3.5". If your tires/exhaust have enough room, try to bias the axle to the pass side some for more clearance. Might work, might not
If you dont have an adj panhard, then remove yours and shift the axle over until it clears the DS. Measure bolt hole to bolt hole and compare to the stock adj panhard hole to hole length. An adj panhard gives approx 1/2" +/- from stock
i've got a line on a denny's nitrous ready shaft in a 3" diameter that should fit the bill just fine.
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