I need help finding a thread. There was a thread listing what rear ends will fit in a 56 pontiac. The thread I am looking for list the rear end, wheel bolt pattern etc. it listed gm ford and i believe jeep Thanks for the help Poncho
Poncho, I didn't see references to jeep, but there is a lot of diff info in these posts...grab a cup of coffee '55 Pontiac rear end question http://www.jalopyjournal.com/forum/showthread.php?t=731846&highlight=56+pontiac+rear 55 Chevy rear questions http://www.jalopyjournal.com/forum/showthread.php?t=718257&highlight=56+pontiac+rear ket Oldsmobile V8 Information Compiled http://www.jalopyjournal.com/forum/showthread.php?t=715390&highlight=56+pontiac+rear&showall=1 Pontiac/Olds Rearend TECH...post it here... http://www.jalopyjournal.com/forum/showthread.php?t=129676&highlight=56+pontiac+rear&showall=1 Olds/Pontiac Rear vs 9" Ford http://www.jalopyjournal.com/forum/showthread.php?t=535819&highlight=56+pontiac+rear&showall=1 Technical Pinion yoke interchange/advice? http://www.jalopyjournal.com/forum/showthread.php?t=502622&highlight=56+pontiac+rear Olds/Pontiac axle sources needed http://www.jalopyjournal.com/forum/showthread.php?t=490108&highlight=56+pontiac+rear&showall=1 1955 Olds/Pontiac rearend parts? Interchangeability? Please? http://www.jalopyjournal.com/forum/showthread.php?t=460681&highlight=56+pontiac+rear Pontiac/Olds Rear axle?? http://www.jalopyjournal.com/forum/showthread.php?t=418483&highlight=56+pontiac+rear&showall=1
49-57 Pontiac and Olds (57 is better than the others); 71-81 Camaro/Firebird (Chevy lug bolt pattern) will bolt in there with no changes. There are others that will work if you're willing to add spring perches.
Thanks tfor the help I found the thread I was looking for ( it was for a 56 olds) I think it should also fit in a pontiac Thanks Poncho
Incidentally, why was the olds/pontiac rear built so beefy? Or to put it better, why did the 55-57 and beyond olds and pontiacs get such a beefy rear? (the 47-57 bops were not exactly mega powered.......)
Guess again, grasshopper. Get you ass wupped by a 57/58 Olds J2 371 tri-power... The Olds-Pontiacs got the big rear end in 57. ...right when the 371 Olds came out and close to when Pontiac was also making serious torque. 57 Pontiac: 57 Olds: ..and looking at those torque specs (the last number), you now know why 57 Chevys had a wimpy ass rear end.
Olds really had 410 tq in 57? How come i'm only hearing about it now? Incidentally what rear did chevy have in 55-57?
Go to carnut.com. Click on "specs", then the maker, then the decade; 50 or 60 etc Take a look at the HP torque race from the first OHV8s in 49 up to the end of the true early Olds Rockets in 1964, and then you will know why Olds ruled the drags for quite a while. Here is a 4 barrel 394 in 1964...the end of the early Rocket; <TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD noWrap>345 H.P.</TD><TD noWrap align=right>V8-394</TD><TD noWrap align=middle>4 Barrel</TD><TD noWrap align=middle>4.125 x 3.688</TD><TD noWrap align=middle>394</TD><TD noWrap align=middle>10.5</TD><TD noWrap align=middle>345 @ 4800</TD><TD noWrap align=middle>440 @ 3200</TD></TR></TBODY></TABLE> Interesting reads from hamber Owen Thomas who worked for Olds R&D in the 50-60s; he said they tried all sorts of mods to the new Borg Warner T10 4 speeds, but could not get them strong enough for the Olds. He said they just stripped the teeth right off Chevy used the same rear from 55 til 64 in the full size. Very small compared to even the pre-57 Olds/Pontiacs. Chevy never had a good trans till the T10 came out. Attached PDF file, is a Hot Rod Magazine article from 56, prior to the T10, As you will see, they used Buick/Olds gears in an old Buick trans case to hold up behind a souped up SBC.
Pontiac started the big rear for later build 56's for the dual quad Nascar package...57 was the start for the rest.
The hot lick around here was an Olds or Pontiac rear end in a tri-5 Chevy if you wanted to keep it together when you put some power under the hood. These days finding 57 Rear end to put in that 55 Pontiac would probably be pretty hard to do though.
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