1978 regal rear end it is the same as 1987 gn

[tybob]

i try to find a rear end 8.5 and i found one from a regal 1978 ! it is the same of a gn 1987 ! ......if not what is the diference ! thay look the same !what kind of car is the same rear end of the tr's (year and model ) thanks

 

[rodman99999]

If it has the 3.42:1 ratio, it should work fine and won't change anything with regards to your computer/trans/speedo. The posi rear-end was an option on the TR(still had the same ratio). Look for the same rear-end(8.5") in Cutlass, Monte Carlo, Grand Prix. If the car has a 200 4r trans, the chances are better it will have the correct ratio as well.

 

[tybob]

ok , but it is the same size back plate to back plate ! and the ear on the top of the rear end it is the same angle ! the hosing is the same ! for the gear i can change but i wnot make sure is the same hosing ! thanks

 

[rodman99999]

The housings should be identical. Are the covers interchangable?

 

[tybob]

what is the size back plate to back plate of a tr's ,i dont try the cover ! the rear of the 78" is on a scrap yard ! i want buy it to my 87 t-type but i want make sure is the same of the original 8.5 ! same axel too ! can i see a code on those rear end !

 

[NASSTY]

I thought 78 Regals had 7.5" rear ends??

 

[Chuck Leeper]

Yep..

I thought 78 Regals had 7.5" rear ends??

think that's correct.

 

[BLACK6PACK]

I think so too, and the monte, grand prix and cutlass all at the 7.5 rear. Only the 442 in the mid 80s got the 8.5 other than the TR.

 

[rodman99999]

SHO NUFF! I've always just thought of them as "10 bolts" for the last 30 years(and 12 bolts in the big-block cars), and forgot about the different possible sizes. DUH!!