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#10449 04/19/2004 10:39 PM | Joined: Jan 2004 Posts: 103 Shop Shark | | Shop Shark Joined: Jan 2004 Posts: 103 | Did GMC ever make a hydramatic flywheel to bolt to the 4 bolt hole crankshaft?
My 55 gmc has a 6 bolt hydramatic flywheel and the 52 gmc 248 that wants to power it has a 4 bolt crankshaft :mad: | | |
#10450 04/20/2004 5:33 AM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | I do not recall,,,
do 4 of the 6 holes line up?
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#10451 04/20/2004 10:27 AM | Joined: Jan 2004 Posts: 103 Shop Shark | | Shop Shark Joined: Jan 2004 Posts: 103 | Mechainiac
No 2 holes line up but the flywheel/flexplate 6 bolt has a recess in it for the end of crank 3" circle and the crank shaft 4 bolt has the a lip on the 4 bolts holes so flexplate would not fit flat
looks like the 248 crank takes manual shift only.
Ever hat a 53 hydramatic apart? Did the military have hydramatic in the 40s and early 50s? Bill | | |
#10452 04/20/2004 10:30 PM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | I have had a couple of these units apart. one chevy and one GMC. I know the Chevy has 6 bolts but I do not remember if the GMC had a 4-hole flywheel for the Hydramatic. Yes, the military did have Hydramatics in use in many rigs including tanks  http://www.futurliner.com/trans.htm http://www.drivetrain.com/transautogmapp.html http://www.autotran.us/hmkits1.html
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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-
Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#10453 04/21/2004 12:17 AM | Joined: Jan 2004 Posts: 103 Shop Shark | | Shop Shark Joined: Jan 2004 Posts: 103 | Mechainiac
Looks like my 52(248) will take manual shift only
I did email autotran, and have made a few phone calls. gmc went to 6 bolt cranks in the hydramatic in 53 then all 6 bolt soon after. a year or two newer 248 and it would have the 6 bolt crankshaft.
thanks for your help and the web sites. Bill | | |
#10454 04/21/2004 12:31 AM | Joined: Jun 2001 Posts: 379 Shop Shark | | Shop Shark Joined: Jun 2001 Posts: 379 | A couple last shots: try Stovebolt Engine Co., Patricks, and the Buffalo (info on Inliner's site.) They are involved in the automatic adapters for early engines and may have some information. I believe they make flex-plates to do this. | | |
#10455 04/21/2004 2:12 AM | Joined: Jan 2004 Posts: 103 Shop Shark | | Shop Shark Joined: Jan 2004 Posts: 103 | Splashoil
I see on the Bufflo site, (custom flexplates). I will call them tomorrow they may have done this before or know if it can be done. thanks Bill | | |
#10456 04/21/2004 2:23 AM | Joined: Jun 2001 Posts: 379 Shop Shark | | Shop Shark Joined: Jun 2001 Posts: 379 | He is a one man shop, does very good work, knows his stuff. You won't be disappointed if you decide to use him. Good luck! | | |
#10457 04/21/2004 10:34 PM | Joined: Jan 2004 Posts: 103 Shop Shark | | Shop Shark Joined: Jan 2004 Posts: 103 | Splashoil
Bufflo said the same hydramatic won't work with 4 bolt crank.
So I Will have a rebuilt 248 allready to put in my next GMC with the manual shift tranmission.
I have the military 302 that should bolt up to the 55 hydramatic it has the 6 bolt crankshaft. Got any tips on that motor swap? Bill | | |
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