ocelot729 Posted June 30, 2014 Report Share Posted June 30, 2014 My rear end is toast, loud clunk when I try to turn it, I assume the spider gears or posi is jacked. I have a z71 but would like to know what the spline count is for my axles. anyone know? I know I have 3.42 gears. A guy around here has a rear end out of a 03 or 04 Silverado with disc brakes (mine are drums) will this bolt right up for the most part, brakes work and all?. any and ALL info you guys could share would be awesome, The guy wants like $200 for the rear end I believe (I'd have to double check). Also would it be better to go to 3.73 gears? or Stock 3.42? or even go lower to a 3.09 or something. guy up here says go with a smaller ratio. Quote Link to comment Share on other sites More sharing options...
SS-GTP Posted June 30, 2014 Report Share Posted June 30, 2014 I can't commit on the fit-up from drum to disk setup, but according to your info your 4WD. So what ever ratio you put in the rear needs to match the front. Second, a lower ratio means numerically higher. I'm assuming when the guy said smaller that's the same as lower. So those 3.09's may provide some fuel economy but will be sluggish for acceleration. So him saying go smaller probably means to go 3.73 or a number greater then 3.42. Quote Link to comment Share on other sites More sharing options...
ocelot729 Posted July 1, 2014 Author Report Share Posted July 1, 2014 Yeah, he says the lower the ratio to him means lower gears. dumb I know. but would it be better to go to 3.73 gear from 3.42? is it worth is really or would I even notice a difference... and yes I am 4WD so the front must match the rear I know. the disc brakes is the big concern really to me. it should bolt up and fit but with the master cylinder have the pressure for it? Quote Link to comment Share on other sites More sharing options...
Downeast Johnny Posted July 2, 2014 Report Share Posted July 2, 2014 I suspect that you will need to find an all disc master or perhaps just an all disc proportioning valve. (For front to rear brake bias). Quote Link to comment Share on other sites More sharing options...
ocelot729 Posted July 2, 2014 Author Report Share Posted July 2, 2014 Yeah, I'm trying to see if anyone has done it before or if this will be a new adventure. lol Quote Link to comment Share on other sites More sharing options...
Downeast Johnny Posted July 2, 2014 Report Share Posted July 2, 2014 Yeah, I'm trying to see if anyone has done it before or if this will be a new adventure. lol Gotcha. Good luck with the project. Quote Link to comment Share on other sites More sharing options...
ocelot729 Posted July 3, 2014 Author Report Share Posted July 3, 2014 Thanks Quote Link to comment Share on other sites More sharing options...
ocelot729 Posted July 7, 2014 Author Report Share Posted July 7, 2014 OK, I know you guys have built some nasty rear ends on here to handle the beyond crazy horsepower some are laying down in these trucks. What are the "best" parts to look at and what should I avoid, speaking carrier wise. Eaton? Auburn? Posi? Locker? Spool? Quote Link to comment Share on other sites More sharing options...
evandostert Posted July 8, 2014 Report Share Posted July 8, 2014 I think you want 4.10 or higher and posi rear diff Quote Link to comment Share on other sites More sharing options...
ocelot729 Posted July 8, 2014 Author Report Share Posted July 8, 2014 4.10? with the 4 speed? granted this is my DD as well as my toy, baby.... lol Quote Link to comment Share on other sites More sharing options...
bigreds10 Posted July 8, 2014 Report Share Posted July 8, 2014 Spline count should be 33..thats what mine are....but I have the 9.5 14 bolt with 6 lug axles from factory with 4.10s and was my DD for 5yrs...I did drum to disc also, you will need new rear brake lines (flexible at the caliper) and new ebrake cables.. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted July 8, 2014 Report Share Posted July 8, 2014 Detroit TrueTrac Quote Link to comment Share on other sites More sharing options...
evandostert Posted July 9, 2014 Report Share Posted July 9, 2014 What size tires are you running? Quote Link to comment Share on other sites More sharing options...
ocelot729 Posted July 9, 2014 Author Report Share Posted July 9, 2014 When I bought the used rear end out of a 1999 extended cab with discs, I bout the whole rear end, cables and hoses the whole thing. the tires I'm running are General UHP 275/55R20 and I was thinking a Tru Trac Quote Link to comment Share on other sites More sharing options...
evandostert Posted July 9, 2014 Report Share Posted July 9, 2014 I would go 4.10's thats factory for awd trucks with same size tire. Quote Link to comment Share on other sites More sharing options...
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