4 Bolt Change out - Car won't move

[silverback]

Just finished switching my 1G 3-bolt to a 4-bolt. Rear wheels turned by hand while on the jack stands, however, when on the ground the car will not move. In neutral (Standard Transmission), it will not roll, with the car running it will not move when the clutch is engaged, almost like the brakes are on, but they are not. Front brakes are not locked because I can spin the front wheels by hand.

Any suggestions?

Thanks in advance.

 

[Morphius]

Just finished switching my 1G 3-bolt to a 4-bolt. Rear wheels turned by hand while on the jack stands, however, when on the ground the car will not move. In neutral (Standard Transmission), it will not roll, with the car running it will not move when the clutch is engaged, almost like the brakes are on, but they are not. Front brakes are not locked because I can spin the front wheels by hand.

Any suggestions?

Thanks in advance.

Did you install a 4 bolt from an auto car? Different ratios would cause this.

 

[eclipsegsx1736]

What happens when the car is off the ground and you drive it in gear?

 

[silverback]

The rear diff is from a manual car, or at least that is what I was told by the person who sold it to me.

I'm going to get the thing off the ground this weekend to see what happens then, will keep you posted.

 

[GRNDSM]

When you say that the wheels spun while off the ground, did they move in the same or in the opposite directions? It is possible that the rear end itself if locked up and spider gears make the axles move in opposite directions.

Auto rear end might do this if you have a welded center diff (or use VCE). It will not do this if you still have open center diff and a working VC.

 

[Savage Talon]

I just did this and noticed that the gear ratio is on the sticker on the cover. 3.54 I think, you should look at both diffs and verify that both are the same ratio's.

 

[jazzyjay]

When you say that the wheels spun while off the ground, did they move in the same or in the opposite directions? It is possible that the rear end itself if locked up and spider gears make the axles move in opposite directions.

Auto rear end might do this if you have a welded center diff (or use VCE). It will not do this if you still have open center diff and a working VC.

I just had a drive shaft rip in half it cracked the transfer case. The car still drives without because a welded center diff. I drove it out of the shop loaded fine and drove 1 mile once i got home.

Question: While on lift I spun rear wheel and other spun same direction like posetrac in a rear wheel drive car. If you hold one tire while spinning other you feel the tension like it wants to spin. Could this cause the failure?

 

[silverback]

When you say that the wheels spun while off the ground, did they move in the same or in the opposite directions? It is possible that the rear end itself if locked up and spider gears make the axles move in opposite directions.

Auto rear end might do this if you have a welded center diff (or use VCE). It will not do this if you still have open center diff and a working VC.

Been too busy with other projects to work on the car, but got some time today, here are the results... Thoughts??

The rear wheels spin in the opposite direction when spun by hand. When the car is off the ground the front wheels turn when the car is in gear and running, but the rears do not.

Locked up Diff????

Many thanks!

Silverback

 

[GRNDSM]

I have a very hard time following what you wrote...

Do you remember if you could turn the diff yoke, before you installed it?

Raise all 4 wheels off the ground, have a friend hold one rear wheel from turning and turn the other rear wheel (while in neutral). You should spin one or two front wheels. If it can't move, the rear diff is likely frozen.

 

[silverback]

I have a very hard time following what you wrote...

Do you remember if you could turn the diff yoke, before you installed it?

Raise all 4 wheels off the ground, have a friend hold one rear wheel from turning and turn the other rear wheel (while in neutral). You should spin one or two front wheels. If it can't move, the rear diff is likely frozen.

Yes, I could turn the diff yoke before it was installed.

Let me clarify: With the car sitting on jack stands, all four wheels off the ground, I can turn a rear wheel and the other wheel will spin in the opposite direction. When I start the car - still on the jack stands, and put it in first, the front wheels will turn, the back ones won't.

What I should do now is have someone hold one of the rear wheels while I try to turn the other rear wheel? When I do this are you saying that one or both front wheels should turn? - I have done this; all four wheels are off the ground, I cannot turn a rear wheel while someone is keeping the other side from turning.

Many thanks!

Silverback

 

[HIGHPSI4]

Is the drive shaft turning while the car is running in gear? The rears should rotate opposite each other. When one is held it should transfer the power to the drive shaft and rotate the center diff. which will rotate one front tire.

 

[silverback]

Is the drive shaft turning while the car is running in gear? The rears should rotate opposite each other. When one is held it should transfer the power to the drive shaft and rotate the center diff. which will rotate one front tire.

Okay, the rear wheels will not turn when one is being held - car in neutral. The drive shaft is not turning while the car is running, in gear - front wheels turning.

Slowly progressing???

Many thanks in advance.

Silverback

 

[GRNDSM]

Bite the bullet and drop the transfer case. Then, see if it turns, if it does try to turn the driveshaft with t-case off the car. If it both turn, the problem is inside the tranny.

 

[MaNGiNa24]

Bite the bullet and drop the transfer case. Then, see if it turns, if it does try to turn the driveshaft with t-case off the car. If it both turn, the problem is inside the tranny.

Before dropping the t-case I'd remove the driveshaft from the rear dif, have a buddy hold one rear wheel and then try to turn the other rear wheel. If you see the rear differential spinning (where it connects to the driveshaft) then it's not the rear dif.

 

[GRNDSM]

Before dropping the t-case I'd remove the driveshaft from the rear dif, have a buddy hold one rear wheel and then try to turn the other rear wheel. If you see the rear differential spinning (where it connects to the driveshaft) then it's not the rear dif.

I would normally suggest the same thing, but it sounds like he did the oppiste (turned the yoke before he installed the diff), so it shouldn't be that.

BTW, I had to edit my post and the quote of my post because of typos

 

[silverback]

Well I've gotten the bolts out of the t-case and I'm in the process of wiggling (fighting) off the transmission. Anyone with any suggestions on that? Right now I've got about a quarter to three-eights inch gap between the t-case and the gear box, but it's really slow going.

I'll post the results once I have them.

Silverback

 

[GRNDSM]

Use a pry bar and make sure not to drop it on yourself