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gear ratio mismatch / tires slipping

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Dunc03, Mar 26, 2002.

  1. Dunc03

    Dunc03 1/2 ton status

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    Well for all of those who posted to my last question. I took my k5 back to the guy that installed the new posi, and he said that when he divided the ring by the pinion it came out to 3.10 so he put in a 3.08. I personally have never heard of a 3.10 chevy gear ratio. Is this a possible gear ratio or did he not count correctly. If anybody knows, could you give me the possible gear ratios they put in stock blazer. I think they had the 3.08, 3.43, and 3.73 that went in the stock blazers. I have a 86 with a 305/700r4/np208 with ten bolt diffs. Thanks for the ideas
     
  2. René

    René 1/2 ton status

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    3,10:1? Never heard!
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    http://www.slosh.com/cars/brochures/blazer4.html

    The specs are all there. Your vintage/vehicle, without looking, I'm going to say 3.08, 3.42, and 3.73 were the only gears available. In the recent past, AFAIK, GM never had 3.10's. Maybe the guy just rounded off to the nearest 10th lol
     
  4. DesertDueler

    DesertDueler 1/2 ton status

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    I would say pull both covers and check the gear ratio. It should be stamped on the ring gear, but if not count the teeth.
     
  5. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Yeah, never heard of 3.10's either......but there is really no difference between 3.08 and 3.10 since you are only talking about 2 hundreths. You could probably find more variation in tires due different amounts of wear, differences in air pressure, or simple manufacturing process. You would need at least a difference such as 3.08's to 3.42's to really be able to notice the condition you have.
     

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