Improving pinion angle on old iron GM

[bulls12]

I have a pre-ran ‘75 Buick and the rear end/pinion is sitting at a downward angle. Is it possible to shorten the lower trailing arms to try to help the angle? If so, is it a pain to get everything to bolt up if they are shortened? Any tips are appreciated!

[owen11x]

Thats exactly how you do it and use come alongs or ratchet straps to pull it around to install not bad at all. Plate where you shortened trailing arms if allowed to or make some from 2x3 tubing

[Demo502]

Vic lowers are shorter, we always swap them out right off the bat.

[cheezwhiz31]

Jun 6, 2022 8:41:42 GMT -5 Demo502 said:

Vic lowers are shorter, we always swap them out right off the bat.

Correct... I also do ford uppers if angle is still not right...

[bulls12]

Thanks guys! Do the Vics fit on there pretty easy then?

[smashford]

Yup bolt in...I think you need to use the vic bolts if I'm correct as theyre just a hair smaller diameter

[cheezwhiz31]

Jun 14, 2022 9:53:48 GMT -5 smashford said:

Yup bolt in...I think you need to use the vic bolts if I'm correct as theyre just a hair smaller diameter

Other way around. The vic bolts are too big for the ears on a gm rear end...

[bulls12]

Thanks everyone. When I do get the different bottom arms on and trying to get everything to line up again, would you guys go in this order?

Top trailing arms
Bottom trailing arms
Springs
Shocks

And use ratchet strap/come along try to get the rear end rotated around to line up correctly?

[owen11x]

I always did Lowers first but you can do whatever is easiest for you

[cheezwhiz31]

Jun 24, 2022 12:57:53 GMT -5 bulls12 said:

Thanks everyone. When I do get the different bottom arms on and trying to get everything to line up again, would you guys go in this order?

Top trailing arms
Bottom trailing arms
Springs
Shocks

And use ratchet strap/come along try to get the rear end rotated around to line up correctly?

Yes on strap. I'd go

Lowers
Uppers
Coil springs
Shock or Chain ( i run both) Usually do Chain to height then see where shock needs to be be bolted.

Get all bolts through and when you have it set where you want it tighten everything up.

Pipe wrenches work really well too twist arms if need be.

[bulls12]

Awesome, going to give it a shot this weekend. Would arms off of a 97 town car work the same as a Vic?

Also, would it be better to just swap uppers and lowers right off the bat or think I would be good with just the lowers? Thanks again everyone!

[cheezwhiz31]

Jun 27, 2022 21:10:05 GMT -5 bulls12 said:

Awesome, going to give it a shot this weekend. Would arms off of a 97 town car work the same as a Vic?

Also, would it be better to just swap uppers and lowers right off the bat or think I would be good with just the lowers? Thanks again everyone!

Yes same thing. Depends on how bad this car is in the rear. Is it dumping out in front of the humps? I just seen that this is in a pre-ran car. Be careful when you pull everything this may be very difficult to get back together. If package tray is bending i'd just do lowers first. Uppers could be a major pain if stuff is bent. If still pretty straight then i'd do both right away.

[STROMI 121]

Bigger springs help

[robertryan]

Is it dumping out in front of the humps? I just seen that this is in a pre-ran car.
Be careful when you pull everything this may be very difficult to get back together.

If package tray is bending i'd just do lowers first.
Uppers could be a major pain if stuff is bent.
If still pretty straight then i'd do both right away.

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