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changing diff ratios
Posted: Mon Jan 10, 2005 3:42 pm
by morkz
Hey
I just picked up some 4.6 out of 2.8 GU, how hard is it to change ratios can it be done with general mechanical tools or do i need special equipment.
just going to change ratios and use my old centre's any advice be appreaciated.
i know there was talk of it with GQ stuff but couldnt find the thread if someone does come across please let me know
cheers
Posted: Mon Jan 10, 2005 6:37 pm
by Grungle
I rang up today to price changing my 4.88's to 4.11's and they want $400 each end ($800) to swap and that is without new bearings
Changing the crownwheel is simple as it is just a few bolts. You will need a bearing puller for the pinion which MAY stuff your bearings (that is why they always quote new bearings). When removing your diff centre from the housing mark one side of the carrier bearings and bracket so they go back on in the exact position they were removed (I used a scribe and a single line for one side and 2 lines for the other)
You can get away with standard tools but will need a bearing puller.
Were it gets tricky is setting up your pinion backlash (I think this is what it is) as they use dial guages etc to get perfect. This is the main reason people use a transmission specialist.
Regards
David
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Posted: Mon Jan 10, 2005 7:46 pm
by morkz
cheers
thanks for the advice i'm probably going to take them down to a mates workshop pull them all out and the guy around the corner said he would charge around $100 per end to get the backlash done
Posted: Mon Jan 10, 2005 8:40 pm
by bogged
Grungle wrote:I rang up today to price changing my 4.88's to 4.11's and they want $400 each end ($800) to swap and that is without new bearings
I had quotes from $400ea, upto $1200 with complete bearings and seals front and rear... That included servicing the LSD....
aint cheap eh!
Posted: Mon Jan 10, 2005 8:56 pm
by morkz
damn thats heaps.........
youd probably want to swap comeplete centre for that price
Posted: Mon Jan 10, 2005 8:59 pm
by bogged
morkz wrote:damn thats heaps.........
youd probably want to swap comeplete centre for that price
that was. Rebuilding the second set, them R&R of the ones in the car.
Posted: Mon Jan 10, 2005 9:03 pm
by morkz