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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jul 2019 Posts: 83 'Bolter | | 'Bolter Joined: Jul 2019 Posts: 83 | Went to change gear ratio on my 41 rear end. Turns out that everything from and including the output shaft flange to rear Spyder gears are worn out. None of the OTC dealers have anything to help. I am looking for suggestions on either parts to keep semi stock or the best suggestion to upgrade. | | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | It helps if you tell us what size/series truck you're working on... Mike B  | | | | | Joined: Oct 2019 Posts: 238 'Bolter | | 'Bolter Joined: Oct 2019 Posts: 238 | We need more info to be able to help. Is your truck 1/2, 3/4, 1 ton, or 1.5 ton? How many lug nuts per wheel? | | | | | Joined: Jul 2019 Posts: 83 'Bolter | | 'Bolter Joined: Jul 2019 Posts: 83 | The truck is a 1/2 ton AK, 4 speed, with GMC 228 engine. I was, am trying to change the gear ratio for 411 to 355./ | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Probably any '41 to '47 at least axle will fit, however, it might be less expensive to just get a whole new rear rear end. Not many will stock the required parts.
Ed
Last edited by EdPruss; 01/22/2020 8:10 PM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Jul 2019 Posts: 83 'Bolter | | 'Bolter Joined: Jul 2019 Posts: 83 | What I am looking for is information and parts to repair a worn out drive line. I need a output flange, spyder gears, etc... or a complete more modern replacement. | | | | | Joined: Oct 2018 Posts: 30 Olddog | | Olddog Joined: Oct 2018 Posts: 30 | I have a complete rearend out of a 48 GMC 228, 4speed. E-mail me at [email protected], with questions, if at all interested. | | |
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