Pinion too tight?

[GotWood]

I set up a d35 just as specs say, having 36 in/lb of resistance on the pinion, but it sure seems tight?? You can't spin it with one finger that is for sure.

 

[Cperry]

thats not spec for a dana 35 thats a dana 60 spec.

your looking for 12-14inlbs might want to put in a new crushsleeve and start over a 35 pinion bearing is not going to like that much they are little

 

[GotWood]

According to these specs I should be correct, pages 9 and 10. I added all of the calculations together and got a 24-46 range. Luckily I have 2 extra crush sleeves if I need to re-set it. I just measured the rotation at 34 in/lb with the carrier and axles, and all new seals.

http://www.pirate4x4.com/tech/billavista/PDFs/Dana_light_axle_service_manual.pdf

 

[BUCKEYE PERFORMANCE INC.]

not trying to sound anal but why did you ask if your calculations are correct. sometimes the internet provides more information than one can handle!

 

[J.C.]

There's definately a discrepancy there. Your link looks like it shows 15-35 inch pounds for pinion bearing preload, which is an awful lot of margin to me. The Yukon instruction booklet calls for 12-14 inch pounds of pinion bearing preload for the D35. I just know that I've not gone wrong with Chase's recommendations in the past!

 

[GotWood]

I agree with JC on the margins, that is why Cperry's input is good to know. I think I am going to re-set the bearing to the 12-14 range. Should that be only the pinion resistance or is that with the new seals, carrier and axles included??

 

[Tom@Hilltop_Machine]

Its preload so the pinion by itself.

 

[Cperry]

I did not read the calcs. but i assume they are measuring preload based on total unit preload. pinion turning ring gear and shafts then yes 36inlbs is probably right. 10-14inclbs is just the pinion bearings. typically factory spec is without seal in but with a crushsleeve design seal kind has to be in or just going to have to redo it. Seal drag is negligable anyway. I have measured both ways and seal may add 1inchlb. Do to the nature of the dana 35 i would probably make certain that the pinion bearings with seal had no more than 20inchlbs of preload. If it does i would drop another crush sleeve in and reset.