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Ecklers AutoMotive
Username Post: 56’ Bel Air Tranny Swap        (Topic#354872)
CRIZROCK56 
Poster
Posts: 9

Reg: 01-16-19
01-16-19 11:25 AM - Post#2757543    

Hi , I removed the Powerglide from behind a 265 in my ‘56 BelAir . I replaced it with a TH350 I am attempting to mount a newer starter but it will not bolt to the block . The adapter plate I removed from power glide does not mount to TH350!. What’s the best way to mount starter .also can I use same tranny lines ? Thank You .

BUDDY HOLLY LIVES !



Edited by CRIZROCK56 on 01-16-19 11:30 AM. Reason for edit: No reason given.

 
Ecklers AutoMotive
acardon 
Ultra Senior Member
Posts: 11146
acardon
Loc: DFW TEXAS
Reg: 03-25-05
01-16-19 01:21 PM - Post#2757547    
    In response to CRIZROCK56

Starter adapter: Link

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
56sedandelivery 
Dedicated Member
Posts: 5569
56sedandelivery
Age: 67
Loc: Everett, Wa.
Reg: 02-26-08
01-16-19 02:11 PM - Post#2757550    
    In response to acardon

You ALSO need either a rear crossmember/trans mount OR an aftermarket mount kit to side mount the TH350 transmission to the stock frame mounts/horns. If you're keeping the column shifter, you'll need the detent display for the dash and the linkage kit to connect to the transmission shift lever. Your transmission cooler will work, but you'll need to rebend the hard lines to fit. I am Butch/56sedandelivery.




 
CRIZROCK56 
Poster
Posts: 9

Reg: 01-16-19
01-16-19 02:14 PM - Post#2757551    
    In response to 56sedandelivery

Thank You . yes i purchased the column shift rod kit from lokar and used a rear crossmember mount. Glad to here transmission cooler will work > I noticed on one of the original tranny lines there was a one way valve . Do I leave this brass check valve on?



 
CRIZROCK56 
Poster
Posts: 9

Reg: 01-16-19
01-16-19 02:15 PM - Post#2757552    
    In response to acardon

Thank you



 
56sedandelivery 
Dedicated Member
Posts: 5569
56sedandelivery
Age: 67
Loc: Everett, Wa.
Reg: 02-26-08
01-17-19 10:43 AM - Post#2757603    
    In response to CRIZROCK56

  • CRIZROCK56 Said:
Thank You . yes i purchased the column shift rod kit from lokar and used a rear crossmember mount. Glad to here transmission cooler will work > I noticed on one of the original tranny lines there was a one way valve . Do I leave this brass check valve on?


That valve is probably something a PO installed to try to keep the Powerglide from "burping"; purging fluid after they sit a while through the fill tube. I'd delete it for the TH-350. I am Butch/56sedandelivery.




 
62chevy427 
"12th Year" Silver Supporting Member
Posts: 2154
62chevy427
Loc: laurens sc
Reg: 04-13-06
01-17-19 03:34 PM - Post#2757623    
    In response to CRIZROCK56

if you are still using the front motor mounts you will also need the side mount kit (i got one from ecklers) to keep the motor from twisting. long time ago i tried chaining one to the frame on both sides and it bent the front motor mounts. 265 does not have bolt holes for frame side mounts.

56 bel air ((since 2002)
62 impala ss (since 1965)
65 el camino (since 1969)
66 nova (since 1987)
67 malibu convertible (since 1981)
72 el camino ss454 (since 1985)
83 gmc 4wd (since 1991)
95 impala (new)
15 chevy equinox



 
CRIZROCK56 
Poster
Posts: 9

Reg: 01-16-19
01-17-19 04:07 PM - Post#2757626    
    In response to 62chevy427

So what your saying is the front engine mounts and the rear crossmember for the transmission is not enough ?
Thank you



 
Rick_L 
Honored Member
Posts: 27574
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
01-17-19 08:02 PM - Post#2757645    
    In response to CRIZROCK56

With a 265 or 57 283, you need aftermarket rear mounts that replace your stock rear mounts. A crossmember under the rear of the transmission by itself is unacceptable, it allows the engine/trans to "roll over" on the mounts too easily, as they are not far enough apart. If you wish you can run a crossmember too, but you must have the bellhousing mounts.

These mounts are attached by the transmission to engine bolts at the bellhousing.

For your starter, you need the aftermarket starter adapter plate that goes between the transmission and engine.



 
CRIZROCK56 
Poster
Posts: 9

Reg: 01-16-19
01-18-19 10:52 AM - Post#2757670    
    In response to Rick_L

OK I understand . Thank You for the informations guys .



 
56sedandelivery 
Dedicated Member
Posts: 5569
56sedandelivery
Age: 67
Loc: Everett, Wa.
Reg: 02-26-08
01-18-19 08:34 PM - Post#2757703    
    In response to Rick_L

My next door neighbor has a 56, 210, 4 door sedan he inherited from his Father. Has a 350 engine that's front mounted with stock mounts, and a TH-350 transmission that has the aftermarket, side mount transmission kit. He does not have a rear crossmember; the transmission just "hangs" out there, like the stock transmissions do. It has been this way for many years, but I personally would not do it this way. I've also know guys who kept the stock front engine mounts, later automatic transmission, and a rear crossmember/trans mount. I would't do it that way either. Side mounting the engine (can't be done with 55-57 blocks however), and using a rear transmission mount/crossmember is the best way. Next best way would be a 3 point mounting; stock front engine mounts, aftermarket side mount transmission kit, and a rear trans mount/crossmember. My Pro Bracket 56 Chevrolet I ran in the late 70's/early 80's had a BBC, Chevy II aluminum Powerglide, and a Camaro 12 bolt rearend. The engine was mounted with a Hurst saddle mount at the front, and a rear trans mount/crossmember at the rear. The wide stance of the Hurst saddle mount prevented engine torque-over. Never had any problem with the long distance between engine-trans mounting; even with the Chevy II Powerglide with the 4, 3" cooling holes, in the bellhousing. Course everyone said I'd break the bellhousing; never happened. You could probably come up with a way to prevent engine torque-over using stock front mounts (chain, metal bracing, etc), but it would probably be noisy and transmit engine vibration. Then you could use just a rear trans mount/crossmember. I am Butch/56sedandelivery.




 
Rick_L 
Honored Member
Posts: 27574
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
01-19-19 09:00 AM - Post#2757718    
    In response to 56sedandelivery

  • Quote:
Next best way would be a 3 point mounting; stock front engine mounts, aftermarket side mount transmission kit, and a rear trans mount/crossmember.



By my count that's a 5 point mount.




 
62chevy427 
"12th Year" Silver Supporting Member
Posts: 2154
62chevy427
Loc: laurens sc
Reg: 04-13-06
01-21-19 04:54 PM - Post#2757904    
    In response to CRIZROCK56

yes. been there,tried that. the front original motor mounts are not far enough apart,like side mounts, to keep the motor from twisting. i tried it on a 55 and i think the only thing that kept it from moving more was the exhaust. the bottom of the engine must have moved 2 or 3 inches.


56 bel air ((since 2002)
62 impala ss (since 1965)
65 el camino (since 1969)
66 nova (since 1987)
67 malibu convertible (since 1981)
72 el camino ss454 (since 1985)
83 gmc 4wd (since 1991)
95 impala (new)
15 chevy equinox



 
60chev 
Contributor
Posts: 114
60chev
Loc: Rotchester, NY
Reg: 01-24-09
02-05-19 11:37 AM - Post#2759110    
    In response to 62chevy427

I've never had a problem with the original front mounts on any of my 57 Chevys. Had 4 so far with late model trans swaps. One with th400, one with 2004r, one with 700r4 and one with th350. All home made cross members too for trans mount. I am hard on my cars doing burnouts and such and i occasionally race my current 57 with this set-up. Daily driven with lots of miles on my cars. Never broke or twisted anything. So there's first hand experience with several trans swaps. Just sayin'........

60chev

1957 Bel-Air 4-door 327/th400
1979 C20 350/4speed


 
Ecklers AutoMotive
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