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#24300 - Wed Jan 02 2002 12:38 PM Re: 4sp saginaw
Anonymous
Unregistered

Buck you got to look close at that again.If its out of a camaro it supposed to be the same pattern .something aint right. Check it again.How far is it off???
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#24301 - Wed Jan 02 2002 04:22 PM Re: 4sp saginaw
Rick Rickard Offline
Wrench Fetcher
Registered: Wed Mar 29 2000 12:00 PM
Posts: 172
Loc: Rio Linda, Ca. 95673
Buck-o-nine,

I looked through the posts and I did not see what year truck you have.

Rick
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#24302 - Wed Jan 02 2002 06:27 PM Re: 4sp saginaw
Formula1 Offline
Wrench Fetcher
Registered: Sat Nov 17 2001 12:00 PM
Posts: 147
Loc: Connecticut
Tony and Phat,
THanks again for your input, I really appreciate it. But, now you have me confused. I know everyone has their opinion, but what is my option here? I want a trouble free installation without having to re-invent the wheel.
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#24303 - Wed Jan 02 2002 07:01 PM Re: 4sp saginaw
Buck0nine Offline
Member
Registered: Sun Jul 01 2001 12:00 PM
Posts: 50
Loc: park Falls
my truck is a 1948 GMC Pickup. I really dont want to sell this id rater make it work am i not measuring something right? or what.
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#24304 - Wed Jan 02 2002 08:33 PM Re: 4sp saginaw
Tony Offline
Extreme Gabster
Registered: Fri Jan 28 2000 12:00 PM
Posts: 6258
Loc: Where men are men and trucks a...
Buck, all the Saginaws and Muncies T-5's etc have the same bolt pattern.your 48 ,first year of the AD model may still have the older style small bolt pattern.You may have to change the bellhousing.I owned a true 49 GMC that had the newer style bolt pattern. Formula, some guys say a 302 is too much for a T-5 Some guys say its too much for a Saginaw.I have personally known 2 or 3 guys that used Saginaws with no problem and one guy with a 302 T-5 combo that towed a trailer with no problems. And I tore the cluster gear out of a T-5 behind a feeble 2.8 v-6 S10 .Try the tranny of your choice and let us know if it lasts.Then we will have a first hand account.There's a certain guy with a 341 inch roller cam GMC 6 cylinder that Phat is not too fond of.He runs a Camaro T-5 in that car with no problem. So either the trans is strong enough or his engine is all show. If you get the same answer out of two truck nuts, one is lying.
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#24305 - Thu Jan 03 2002 07:54 AM Re: 4sp saginaw
Tony Offline
Extreme Gabster
Registered: Fri Jan 28 2000 12:00 PM
Posts: 6258
Loc: Where men are men and trucks a...
Here's a few photos of some of the transmissions dicussed above. The first photo is a Saginaw 4spd. You can see the ratio ID rings on the imput shaft.Although I have never seen one without ID rings, Phat's comment about the lack of the rings may apply to replacement parts.The second photo is the A833 4 spd OD trans.Note that this one has a oddball bolt pattern that requires the special housing to bolt up to Chevy V8 or 230-292 6's.The third photo is a genuine 49 Chevy truck bellhousing on the top and the factory housing on the bottom, that is for the 4 spd OD trans in the previous photo.Buck, check out the bolt holes on the Saginaw and the 49 housing.Muncies car 4spd use the same bolt pattern.All the trannys in the photos are 21 inches long overall.
[img]http://pstr-m02.ygpweb.aol.com/data/00F/5F/EE/4D/8C/UTA0KXu8iAP3lQICBboQyGYf3yDfLwQp0180.jpg[/img]
[img]http://pstr-m05.ygpweb.aol.com/data/006/00/78/85/F4/4178fwtEtiQyig0ZBaLzeuw5v-hxMbbh0180.jpg[/img]
[img]http://pstr-m01.ygpweb.aol.com/data/005/67/1E/D3/16/Clit0Kx1ISfK-fcraR9cymLYeaNR4gBw0180.jpg[/img]
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#24306 - Thu Jan 03 2002 10:17 AM Re: 4sp saginaw
Frank54 Offline
Shop Shark
Registered: Fri Aug 17 2001 12:00 PM
Posts: 539
Loc: Scranton, PA. USA
Buck,

What tranny was originally in your '48 GMC?

Was it by chance a floor-shift 3-speed?

Column shift 3-speed?

The earlier tranny pattern on the truck (and car through'54) had the top two holes fairly close together(?).
The aluminum bell housing in the bottom photo appears to be cast in such a way that it can be drilled to accept any of the post-54 trannys.
If the bolt pattern on your bell is different from the one on the green bell housing in the picture, than I'd say you have the early pattern housing on your engine, which is very limiting: you'd need to change to the '49 to '53 bell housing to mate the later trannys.
_________________________
Frank McMullen
1941 Chevy dump truck
1949 GMC 100 pick-up
1954 Chevy 3600 pick-up
1955.1 4400 dump truck
1941 De Soto & other MoPars
1928 Model A F**D Special Coupe
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#24307 - Thu Jan 03 2002 04:50 PM Re: 4sp saginaw
Buck0nine Offline
Member
Registered: Sun Jul 01 2001 12:00 PM
Posts: 50
Loc: park Falls
It is a 4sp. tranny. The 49 bellhousing looks like the same bolt pattern as my saginaw but my bellhousing isnt that far off.
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