95 roadmaster rear end posi unit

[Ricky Bobby]

like the title says drum to drum its a posi was a grandmas car that got whacked in the pass side now im gonn derby it so $100 can have it

[84hurst]

Miles? Sedan or wagon? I guess they are different. What gears?

[Ricky Bobby]

car had 60xxx and it was a sedan gears i dont know yet i could check later today when the kid goes down for his nap :thumbsup

car said it had the dynaride and was the collectors edition in gold letterin on the side, these things look like they might be a nice ride if wasnt punched in the pass post lol


just checked believe it to be a 3.08 gear

[84hurst]

I talked to a friend that also has a 95 sedan. He doesn't wanna change the factory open 2.56 rear. :punch:

[SSScottSS]

A guy I know was just telling me last week his rear end was howling in his caprice so he wanted to swap out the rear for a decent posi. I'll let him know about yours. I think it would fit

[BAD LS1]

Tony you need to list the rear end size and what gear ratio is in it now to determine the series carrier it is because that can be a deal breaker. Obviously its a 10 bolt 8.5"/8.625" axle though. But what is axle spline count on this though? 28 or 30?

[juicedimpss]

Tony you need to list the rear end size and what gear ratio is in it now to determine the series carrier it is because that can be a deal breaker. Obviously its a 10 bolt 8.5"/8.625" axle though. But what is axle spline count on this though? 28 or 30?

it COULD also be a 7.5.
tom,the big cars all had 30 spline axles with the 8.5

[Ricky Bobby]

A guy I know was just telling me last week his rear end was howling in his caprice so he wanted to swap out the rear for a decent posi. I'll let him know about yours. I think it would fit

as far as i know it should be damn near direct repl. not sure on the brake lines but as for the trailing arms yes


Tony you need to list the rear end size and what gear ratio is in it now to determine the series carrier it is because that can be a deal breaker. Obviously its a 10 bolt 8.5"/8.625" axle though. But what is axle spline count on this though? 28 or 30?

i dont know tom as of now its still under the car but if someone really wants it out now i will cut it out and check for them


it COULD also be a 7.5.
tom,the big cars all had 30 spline axles with the 8.5thanx ron

[juicedimpss]

as far as i know it should be damn near direct repl. not sure on the brake lines but as for the trailing arms yes



i dont know tom as of now its still under the car but if someone really wants it out now i will cut it out and check for them

thanx ron

tony,the 8.5s have square "ears" on the bottom of the pumpkin.

[Ricky Bobby]

yes it has the square ears on the bottom of the pumpkin no leaking on either end either, thanx ron :thumbsup

[BAD LS1]

it COULD also be a 7.5.
tom,the big cars all had 30 spline axles with the 8.5

Did these cars have 4.3 motor options too? Would the 7.5 come in the 305 and 262 cars only? Id assume the TBI 350 and LT1 cars got the big axle?

[juicedimpss]

Did these cars have 4.3 motor options too? Would the 7.5 come in the 305 and 262 cars only? Id assume the TBI 350 and LT1 cars got the big axle?

i would believe that would be true Tom. The baby lt1 would have been a 7.5 for sure. I know my 91 305 car has a 7.5 in it also....for now

[Ricky Bobby]

Did these cars have 4.3 motor options too? Would the 7.5 come in the 305 and 262 cars only? Id assume the TBI 350 and LT1 cars got the big axle?

did they put the 4.3's in the bubble caprices and roadmasters i dont think ive ever seen one, i know in the square bodies ive seen them but not in the newer styles

[WickedSix]

did they put the 4.3's in the bubble caprices and roadmasters i dont think ive ever seen one, i know in the square bodies ive seen them but not in the newer styles

yea I worked on a priests car that had the 262..weird little lt1 esque motor

[Ricky Bobby]

hmm never seen one yet ah well this one had the 5.7 in it

[WickedSix]

yea L99 iirc 91-96

[trunkspace]

I just brought home a '79 Bonneville 350 with a 2.41 open rear so this might be just the thing it needs. I think the Roadmasters came with 2.56 standard and 2.93 optional, though. The RPO sticker in the trunk will say GW9 or GU3 for 2.93, GM8 for 2.56, or GU4 if it came with a 3.08. If it's a 2.93 or 3.08, I'm interested.

[Ricky Bobby]

after further review looks like a 2.56 posi 8.5bolt gonna throw it on craigslist if no one wants it then to the scrapper if it dont sell

[Ricky Bobby]

edited last post

[juicedimpss]

let me know before it hits the scrapper

[Ricky Bobby]

sounds good ron ill let u know if nothing happens with it im only gonna hold it for 2wks then ill be calling u