transmission interchange

Discussion of the Early Dodge / DeSoto HEMIs.

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rayu
Posts: 1
Joined: Tue Sep 07, 2010 12:00 pm

transmission interchange

Postby rayu » Mon Nov 01, 2010 11:22 am

I talked to a trans repair shop today concerning the tranny swap between my hemi and a poly. After this conversation I think I may just stick to walking. I have a 56 Desoto Firedome that originally was backed by a 2 speed auto. I intend to put this into my 59 Coronet using the 3 speed auto that came in the car. Should this be a straightforward process? Any and all help appreciated. Thanks. Ray :roll:

George
Posts: 636
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: transmission interchange

Postby George » Mon Nov 01, 2010 12:06 pm

All V8 (non BB)trannys through '62 interchange, as far as bolting up to the engine. Possibly a diffrence in linkage between the 56 & 59, don't know.

Hemi Rookie
Posts: 7
Joined: Tue Jan 30, 2018 12:58 am

Re: transmission interchange

Postby Hemi Rookie » Tue Jan 30, 2018 10:59 pm

Does this mean all Chrysler, Dodge, etc or only the Desotos will bolt up? Are the later trannys much better, aluminum case, etc? Thanks.

George
Posts: 636
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: transmission interchange

Postby George » Wed Jan 31, 2018 12:16 pm

ALL Mopar trannys for the hemi, hemi based poly & "A" Poly up to '61 will bolt on except the 51-3 long tail 331 chr hemis. there were both 2 & 3 speed iron case trannys (PF & TF) available before the change for '62, think '57 was 1st year for 3 spd.

Hemi Rookie
Posts: 7
Joined: Tue Jan 30, 2018 12:58 am

Re: transmission interchange

Postby Hemi Rookie » Wed Jan 31, 2018 4:47 pm

Were these considered strong trannys? I have a lead on a three-speed that could go behind my 330 ci S-24 that we are targeting for 325 HP to go into my F-100. Can the rebuilders put in better clutches and shift kits, etc? Thanks. Gary

George
Posts: 636
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: transmission interchange

Postby George » Wed Jan 31, 2018 5:40 pm

You seem to be spreading this around the Threads! in 57-8 TFs were used behind 392s, so they'll handle a 330 Desoto. However parts for the early trannys are getting real scarce, not to mention anyone experienced in working on them. Personally if you want an A-T I'd get a 392 to late model 727 adaptor from Quality Engineered Components & a SB 727. 70s-80s pick ups & vans are good sources.

Hemi Rookie
Posts: 7
Joined: Tue Jan 30, 2018 12:58 am

Re: transmission interchange

Postby Hemi Rookie » Wed Jan 31, 2018 8:05 pm

Thanks George. Didn't mean to upset anyone. Just wasn't sure how messages get to people when there have been no posts for several years. I'll get it figured out. We have the Transmission Exchange in Portland, OR that has parts and knowledgeable techs for the old stuff. Not cheap, but they have been around since the 40's. Good source. Gary

Hemi Rookie
Posts: 7
Joined: Tue Jan 30, 2018 12:58 am

Re: transmission interchange

Postby Hemi Rookie » Sat Feb 03, 2018 10:23 pm

I have decided to stay with the pre 1960 stuff and, therefore, purchased a TF tranny out of a 392 ci 57-58 Chrysler. When checking the fit it seems the bolt pattern on the TF bell housing does not match the adapter plate that goes between the 330 ci Desoto engine and former PF tranny. I could just use the bell housing from the old PF, but it was an air cooled tranny and has gynormous cooling vents which make it appear not very strong (if all else fails may just have someone weld in some patches to fill the vent holes). Was there a different bell housing for the TF's that went into the Desotos or was there a different adapter plate for each car line to mate up with the variations of these hemi's (Dodge, Desoto, Chrysler)? Thanks. Gary

George
Posts: 636
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: transmission interchange

Postby George » Sun Feb 04, 2018 11:40 am

there are various OEM adaptor plates over the years. Seems strange there would be varying bell patterns in the tranny. The '56, all divisions, has a different number adaptor the '57s, all divisions.

George
Posts: 636
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: transmission interchange

Postby George » Sun Feb 04, 2018 1:49 pm

55-56 Chr., Desoto, & 55-56 & some '54 Dodges. Adaptor is casting # 1612344, part #1613713

George
Posts: 636
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: transmission interchange

Postby George » Tue Feb 13, 2018 10:34 am

The '56s were the last year for the 146 tooth ring gear(33-56). The 57 & up are 172 tooth & uses a different plate & use the modern starter.


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