I have an 86 Blazer with a 6.2 liter diesel. I am putting 33 inch tires on it and want to maintain the same final drive ratio as stock. What ring and pinion do I need?
4:10 probably or more depending on turbo or not. Also what about bigger tires later to consider. Some like that lifted deal and makes for more matters to get by.
I assume you have 3.08's, the real question is what tranny do you have. If you have a 700R4 then you have a lower 1st and a tall OD. I like to keep the 6.2 revved down. Let us know what gears and tranny you have and we can go from there.
I'f I'm understandfing Danmcph's question correctly he's trying to return his RPM/Speed ratio to stock with 33's. If this is correct his tranny ratio has nothing to do with his question unless he changed to a different tranny ratio from stock. If the tranny is stock nothing has changed and all that's needed is the Stock Gear Ratio and Tire size to do the math. Since gear ratios are spaced greatly it's almost imposible to get it perfect. But getting close shouldn't be a problem.
I got a better idea, put 8-lug 3\4ton axles under it, they will probably already have 4.10's and a gov lock rear.
You will put a lot of money in the little rear only to have it break a C-clip going down the high-way and wished you had put the good axles in it to begin with.
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