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SAS Conversion
Posted: Mon Jun 22, 2009 4:12 pm
by bn_sil80
Ok everyone, I'm planning on doing a SAS Conversion on my WD21. One question I have (sorry, maybe stupid) is what ratio front diff should I be using? How does all this work? I have found a guy sell a front diff housing with 3.43 gears. He reckons its the standard ratio across the MQ range - L28, SD33, SD33T.
Cheers
Posted: Mon Jun 22, 2009 5:58 pm
by dazzah
Hi mate
If you're keeping original rear diff then you will need to use a front diff of the same ratio as rear...my wd21 has 4.6 ratio...I also have a d21 navara that i'm doing a solid axle conv on (also 4.6), I was originally going to use MQ diff, when i bought them was told they had 4.6 ratio but when i opened the centre it was 4.3, I bought both diffs so was just going to throw both under...have now changed to using GQ diffs.
One thing to keep in mind, the pathy transfer case has a passenger side output for front driveshaft, the mq and gq diff centres are on drivers side.
Posted: Mon Jun 22, 2009 7:03 pm
by bn_sil80
Yeh the MQ diff needs to be rotated. Hmm I'll get the guy to confirm the ratio on the MQ diff. How do you know what the ratio is? Do you have to open it up? Is it stamped on the housing by any chance?
The GQ diff is to wide. What you going to do about the rear? Change that as well?
diff
Posted: Mon Jun 22, 2009 9:45 pm
by pom300
hey sorry to sorta get off the question but is an mq diff the same as a gq diff if the ratios are same,what i mean is will a mq diff fit in a gq
Posted: Mon Jun 22, 2009 9:51 pm
by bn_sil80
Sorry, the gq/gu diff housing is to wide apparently. the mq is the correct width as the WD21 rear.
Re: diff
Posted: Tue Jun 23, 2009 4:09 pm
by dazzah
pom300 wrote:hey sorry to sorta get off the question but is an mq diff the same as a gq diff if the ratios are same,what i mean is will a mq diff fit in a gq
The MQ is slightly narrower, and it's also a leaf sprung diff, the GQ is coil spring (except for some rear diffs on utes, i think???) If you put an mq diff under a gq and kept the gq coils you would have to weld radius arm links, panhard links, coil hats on to diff...
Yep the MQ diffs are pretty much the same width as the rear on the wd21 and d21...i've measured my gq diffs and they're 1420 from inside of hub to inside of hub...the d21 rear diff is 1300 from inside hub to inside hub...so about 60mm difference on either sides...
Posted: Tue Jun 23, 2009 4:11 pm
by dazzah
p.s. Pom...are you talking diff centre or diff housing?