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Old 07-23-2013, 05:22 PM
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1952 Chevy Truck Tranny question

I'm new here guys and could use a little help. I'm having a '52 Chevy truck delivered in a couple of days. I'm told the 4 speed tranny in it actually came out of a bus and it's geared so low I can take off in 3rd. At 45 mph, it's screaming like my ex-wife with the fuse on her tampon lit What I need to know is what tranny can I drop in there to match up with the stock 235 motor? I'm just looking to make it a daily driver but want to drive it comfortable at highway speeds. Any suggestions. Thx in advance for the help.

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Old 07-23-2013, 05:57 PM
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welcome to the forum . but if you can tone down on the jokes like that kids are on here. now with the right bell housing you will be able to almost pick any 4 speed for this. or even a 5 speed.
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Old 07-23-2013, 06:00 PM
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Yikes! Sorry about that. I didn't realize there were young eyes here. Definitely won't happen again. Thx for the heads up.
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Old 07-23-2013, 06:05 PM
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not a problem. i will give you i few site to look at
Transmission Adapter Pricing

Inliners International devoted to all Inline powered vehicles

http://www.stovebolt.com/ubbthreads/...&Number=808165
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Old 07-23-2013, 07:16 PM
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Thx for the info killer. I'll check it out.
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Old 07-23-2013, 09:41 PM
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It's not your tranny gears. It's your rearend ratio. I had a truck just like that with a 5.13 gear. Top speed 50 mph. Try this guy for rear gear upgrades.
PATRICK'S ANTIQUE CARS AND TRUCKS
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Old 07-23-2013, 10:31 PM
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what size truck ?

I had a neighbor put a truck Clark 5 speed in a 1 1/2 ton farm truck and I think 5 th was an overdrive. You could look for a brownie box for a mid sized farm truck . they mount on a new crosmember like the old 4 X 4 seperate transfer case / early 70's pickups.
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Old 07-23-2013, 11:40 PM
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It's a 1/2 ton. Here's all the history I have on it. A railroad worker drove it into a NC town to work on the new railroad coming through in the late 50's. It overheated when he got to town and wouldn't turn over after that so he sold it to a local mechanic. The mechanic rebuilt the 235 motor and, for some reason, installed a 4 speed tranny from a bus. I don't know (yet) what rearend is in it. I'll have the truck on Thursday and will try to identify the tranny and the rearend this weekend. I've heard a t5 tranny from an S10 is an easy fit but I don't know what rearend would be a good match for that. Does anyone have any experience with that swap?
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Old 07-23-2013, 11:44 PM
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If the T5 info's not in here I'LL---
TRANSMISSION - T5 Tech Links - THE H.A.M.B.
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Old 07-24-2013, 12:13 AM
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It is likely a GM/ Muncie SM 420, which has been around since the 50's. 3rd gear ( 4th if you count the creeper gear as a usable gear ) is 1:1 ratio, just like the factory 3spd that the truck came with.. Just get the 3:36 gears from Patricks.. By the time you get a usable T5 and a new rear end, you still need the $$$$ adapter for the bellhousing..

The rear end is over a 4:1 ratio because that's what they ran in the cars and they could run 60 MPH with. Probably 5.something geared.
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Old 07-24-2013, 08:02 AM
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I second that you most likely have an SM420; although there were other bus boxes, its probably a 420. You probably have a ridiculous rear axle ratio maybe 4.88s or 5.13s. Change that out and keep the SM for now.

Does anyone know what the 1st gear ratio of the saginaw 3spd w. OD is off the top of their head?
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Old 07-24-2013, 08:16 AM
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I'm thinkin' 3.11.
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Old 07-24-2013, 08:23 AM
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[QUOTE

Does anyone know what the 1st gear ratio of the saginaw 3spd w. OD is off the top of their head?[/QUOTE]


Autogear here you go



Saginaw 3 Speeds | Tech Vault | Advance Adapters
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Old 07-24-2013, 07:09 PM
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Thx for all the input guys. I'm going to try the rearend change first and see how much that helps. I'll come back after that's done and update the status.
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Old 07-24-2013, 07:15 PM
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sounds good . run the truck first you may find you like it. also sorry to post info for someone else on your thread !
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