Thinking about changing tire sizes? We can help! Consult our Look up chart for determining engine RPM, gear ratio and tire size combination. We specialize in matching your tire size and ring and pinion ratio for your specific application and needs. Want to search for rear end parts by application, ask the Gear Wizzard If you have installed larger tires, they rob performance, and you would want to go to a lower ratio like a 4.56 or 4.88 depending upon your tire diameter.
CHEVROLET TRANSMISSION RATIOS HOW TO
How to identify chevrolet gmc manual transmissions. If you have a 3.42 rear end ratio and need more towing power you would switch to a 4.10 ratio. GM 9T65 9-Speed Automatic Transmission Info, Specs General Motors transmissions - Crankshaft. It's just backwards from the way we think, if you have a 4.10 ratio and need better fuel mileage you would switch to a 3.42 or 3.73 gear ratio. If your looking for more power or performance, you would switch to a lower ratio.
If you're looking for better gas mileage, you want to switch to a higher gear ratio. Switching your rear end gear ratio helps your gas mileage or improves your power! Now you know your ring and pinion ratio to see parts that are available follow this link We have a large selection of gear sets in stock and can recommend the correct gear ratio to match your engine horsepower, transmission specs and tire size to give you the desired performance. Our experts will help you find the correct ring and pinion set for your particular application. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e.
CHEVROLET TRANSMISSION RATIOS DRIVER
You can typically find your RPO code on driver side door panel or glove box. Thanks again and I look forward to viewing your posts in the near future.The table below will help you determine what rear end ratio you have by using your RPO code, answering the question: What rear end ratio was in my Chevrolet or GMC vehicle when it left the factory. If anyone could help me in this it would be much appriciated. I realise that gas milage will not be good with this transmission any way you go, but I would like to have the "best" possible gas mileage as well.Ĭould anyone help me with determining the gear ratio of the rear end in my truck currently through identifications on the rear end, VIN number, ect? Also, what would be the BEST rear end gear ratio for the truck to have once the 2 speed PowerGlide transmission is installed? Like I mentioned above, the truck that will be recieving the PowerGlide transmission is a 1965 Chevrolet 1/2 ton LWB fleetside with a factory stock original 3 speed on the column manual transmission. I might do some hauling with the truck in the future, so I want to be able to pull a load with it as well. By keeping in my existing rear end and installing the PowerGlide transmission and components, will this be acceptable for my truck? I want to be able to drive the truck at crusing speeds on the highway at 55-65 MPH and hopefully at the same time be able to not do any damage to the engine due to excessive high RPM's. My question is will I need to change out the rear end in my truck when I put this 2 speed PowerGlide transmission in? I do not know what gear ratio either truck has in it currently. I am having the transmission rebuilt currently. The truck itself is not worth tring to restore, but the transmission components are still good in it. There are various ways to get a higher gear in your old Chevy. It was a real jewel to find for myself having all of these original factory parts in it. It is all intact as well to include the transmission, steering column, crossmember, radiator with internal ATF cooling tank and driveshaft. It has the original stock factory 2 speed PowerGlide transmission in it.
I have purchased an 64 model chevrolet pickup from a gentleman to be a donor truck for my project here. I am in the process of changing the original stock factory 3 speed on the column manual transmission to an PowerGlide 2 speed automatic transmission on my 65 model 1/2 ton Chevrolet pickup.