350 Trans Length?

[62BillT]

A friend of mine wants to go from a Powerglide to a 350 Auto Trans in his '62 Impala. Need to verify that the Trans is the same length, using the same type of rear mount and cross member. My knowledge consists of a Clutch Pedal, lol.

Thanks

 

[bobs409]

There were different length tail shafts. I think one was 6 inch and possibly a 9 inch? Might be another too.

I'll let someone that knows more take it from here.

 

[NCPOP]

A friend of mine wants to go from a Powerglide to a 350 Auto Trans in his '62 Impala. Need to verify that the Trans is the same length, using the same type of rear mount and cross member. My knowledge consists of a Clutch Pedal, lol.

Thanks

Google GM transmission length, lots of info with a chart. If I remember correctly as I swapped out a PG for a 350 a couple times. The cross member location was ok, but I short the drive shaft. Actually 1 car was a turbo glide and one was a cast iron PG.

 

[64ss409]

I got this a while back off the internet somewhere.

 

[62BillT]

Great diagram, thanks. That answers the questions that we had.

Although it won't matter for what he is wanting to accomplish, notice that they have the math wrong. On the TH 350 they have the length from the front edge of the trans to the "center" of the trans mount at 22 1/4 Inches, then they have the measurement from the front edge of the trans to the "back edge" of the trans mount at 21 5/8 Inches. It should be longer, not shorter, lol. Some of the other charts online have the PG the same way.

 

[Carl 1962]

I installed a TH350 with the 6" tail in place of the original aluminium Powerglide in my 62. I think the 62 powerglide is a bit shorter than later ones and I had to shorten the front tail shaft by 40mm. I had to grind off about 1/4" from the original trans cross member to fit the TH350 pan. I made my own linkage so that I could keep the column shift original, and I bought a new plastic selector quadrant from, I think, Classic Industries.

 

[Dä Huäbär]

In my 58 Impala was the change of the Poweglide to the TH350 plug and play , only the propshaft was 4" to long . It is the 6" version . The crossmember fits pervectly . But no linkage its available for the 58 , so i must it build by myself

 

[425/409ER]

A friend of mine wants to go from a Powerglide to a 350 Auto Trans in his '62 Impala. Need to verify that the Trans is the same length, using the same type of rear mount and cross member. My knowledge consists of a Clutch Pedal, lol.

Thanks

If he has the factory P/G it ain't going to work as the factory P/G is shorter. The turbo 350 is the same length as a 4speed so to use the turbo 350 you'll need a different front part of the driveshaft. I know I converted mine back in the 90's.