Differential?
Thread Starter
Melting Slicks
Joined: Feb 2005
Posts: 2,592
Likes: 13
From: USA
Differential?
I can usually find answers by searching old posts, but nothing comes up for this problem:
When I accelerate hard the car pulls slightly to the left and if I let off the gas it pulls slightly to right. I changed the diff fluid two years (5000 miles) ago and used synthetic fluid and GM posi additive. Anyone experience this?
When I accelerate hard the car pulls slightly to the left and if I let off the gas it pulls slightly to right. I changed the diff fluid two years (5000 miles) ago and used synthetic fluid and GM posi additive. Anyone experience this?
Race Director
Joined: Dec 2002
Posts: 13,348
Likes: 233
From: SCMR Rat Pack'r Charter Member..Great Bend KS
Advanced
Joined: Jan 2006
Posts: 97
Likes: 0
From: Long Island NY
Same here..
This also happens to mine but it pulls to the right. It's like the whole car is pulled side ways. I did find one bad tie rod on the rear but everything else back there is solid. Front suspension also tight. I suspect the rear is going out of alignment when you gas it, which is produced by the twisting torque of the rear under load. It is currently at the shop getting an alignment and rear outer tie rods installed. Will let you all know my results.
Dave..
Dave..
Safety Car
Joined: Jul 2006
Posts: 3,696
Likes: 1
From: MA
This also happens to mine but it pulls to the right. It's like the whole car is pulled side ways. I did find one bad tie rod on the rear but everything else back there is solid. Front suspension also tight. I suspect the rear is going out of alignment when you gas it, which is produced by the twisting torque of the rear under load. It is currently at the shop getting an alignment and rear outer tie rods installed. Will let you all know my results.
Dave..
Dave..
Pretty much what I said
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
I'd suggest that when you have the suspension (wheels) aligned, find out what the initial toe setting is for the rear end. This may be a clue. (PM me with your numbers)
http://forums.corvetteforum.com/show....php?t=1526279
Advanced
Joined: Jan 2006
Posts: 97
Likes: 0
From: Long Island NY
Aliagnment
Hi all,
As mentioned above I also had this problem but after an aliagnment and replacement of the rear tie rods, the problem is solved . My original aliagnment was way off and one tie rod end had a lot of play.
Good luck..
As mentioned above I also had this problem but after an aliagnment and replacement of the rear tie rods, the problem is solved . My original aliagnment was way off and one tie rod end had a lot of play.
Good luck..
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Le Mans Master
Joined: Jan 2002
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From: Edmonton AB
John Greenwood has this to say about the C4
C4 Beam Plates (Fits all 1984 -1996 Corvette Drivelines)
.
The C4 was built with some inherent engineering flaws that simply
kept it from ever achieving its promise. The flaws and the on-the-line
fixes that were developed make it an extremely difficult car to develop.
You have to find all the band-aids and remove them before you get
back to the original engineering that was laid out. For example,
although the car was quite well designed, the engineering flaws simply
meant that the car would never stay in total alignment. If you were to
step on the gas from a dead stop the (stock) car would go one way or
the other. If you had a lot of horsepower, it would jump around
unpredictably. To compensate, the cars were built with a "bind" in the
chassis to keep everything as tight as possible.
It took us a long time to figure this out. We would fix one piece and
something else would show up. It was a very frustrating experience to
find the right set-up for the street versions of the G-350 and G-500
cars.
ZFDoc offers this solution:kept it from ever achieving its promise. The flaws and the on-the-line
fixes that were developed make it an extremely difficult car to develop.
You have to find all the band-aids and remove them before you get
back to the original engineering that was laid out. For example,
although the car was quite well designed, the engineering flaws simply
meant that the car would never stay in total alignment. If you were to
step on the gas from a dead stop the (stock) car would go one way or
the other. If you had a lot of horsepower, it would jump around
unpredictably. To compensate, the cars were built with a "bind" in the
chassis to keep everything as tight as possible.
It took us a long time to figure this out. We would fix one piece and
something else would show up. It was a very frustrating experience to
find the right set-up for the street versions of the G-350 and G-500
cars.
C4 Beam Plates (Fits all 1984 -1996 Corvette Drivelines)
We have found that most C4 Corvettes inherently experience a slight
amount of twisting at the fastening points of the support beam to the
transmission and differential housing connection surfaces. Although
fastened with high grade bolts, self-locking nuts and adhered with
factory sealant, the driveline components of the C4 Corvette still
experience some level of counterforce load-induced lateral deflection
between the members while under heavy loading. This allowance of flex
in the driveline beam fastening joints creates a condition where the
chassis structure must additionally contend with. One common side
effect of this phenomenon is where the rear of the vehicle tends to
kick out to the right during aggressive high RPM gear shifting.
People who have the beam plates, seem to like them a lot.amount of twisting at the fastening points of the support beam to the
transmission and differential housing connection surfaces. Although
fastened with high grade bolts, self-locking nuts and adhered with
factory sealant, the driveline components of the C4 Corvette still
experience some level of counterforce load-induced lateral deflection
between the members while under heavy loading. This allowance of flex
in the driveline beam fastening joints creates a condition where the
chassis structure must additionally contend with. One common side
effect of this phenomenon is where the rear of the vehicle tends to
kick out to the right during aggressive high RPM gear shifting.
.