The Stovebolt Site Forums The Shop Area Engine Shop Flywheel questions

Going thru the logistics of putting an S10 T-5 transmission in my 55 2nd with a 235. Read all there is to read regarding the swap and have hit a wall with the flywheel. Picked up what I thought was a small block flywheel this afternoon and turns out, according to the casting # 3789733, a big block version. Research indicates that there was no difference in the small to big block flywheels except for some big block 400`s. Matching it up with a 235 flywheel I got with a spare engine, it is off on the bolt spacing. Now I am confused as to which flywheel I need. The articles I have read indicate using a small block flywheel. Anyone have an answer?

the 235 flywheels are different than the later sixes and v8s. i would think you have to use the flywheel and pressure plate at least from the orig engine or maybe have it drilled or machined. maybe a vendor makes one for this conversion. will your t-5 even bolt up to the 235? i didn't think they would w/out a adaptor. might ask where you got the adaptor about the flywheel/clutch combo.

Having the same casting number doesn't always mean that parts will interchange. For instance GMC uses the same casting number on their 6 bolt flywheels, but the ones with a 6 volt ring gear are machined a little different than the ones with a 12 volt ring gear.

Why not use the flywheel out of your 235? That's what I did with my T5 swap. You just need to get a clutch disk to fit the T5 splines.

You will love the T5. One of the best things I've done to my truck.

George

The issue with the stock flywheel is it only allows for a 9 inch clutch, from what I can determine from research. I was hoping to upgrade to an 11 inch if possible. If you are using a 55-59 stock truck bell housing, there is no need for the spacer according to all the tech tips I have been reading.

The 235 trucks had an option of a heavy duty clutch which is 10 3/4". That is the clutch that is in my truck.

10"-clutch flywheels are available (if not standard) for later 235/261 engines.

216, 235 6 volt flywheels came with 9", 10", and 11" sizes.
12 volt came with 10" and 11".

Well it looks like I am on the hunt for a 11 inch flywheel for my truck. Anyone have an idea of a part number or where to look? Also have a stock 139 tooth, pre 54 along with a good 6 volt starter to swap for the right flywheel.
Thanks

Here is a link to the clutch section of the Chevrolet Master Parts Catalog. Page forward and backward to see the part numbers (and some casting numbers) for the various clutch and flywheel that were available in 1957 and earlier.

Hope that this helps. I've had no problems with using 10" clutches behind some strong 261s.

Hoyt