A1AXX 26 2 Cars Posted February 14, 2014 Hi, Just getting around to fitting my diff. It came with its crown wheel and final drive, so no worries there. Where the diff fits into the MA box casing, it scores it where the plates protrude the diff slightly. Do I machine the inside of the casing slightly or take the plate protrusions away with the dremel? Cheers J Share this post Link to post Share on other sites
Tom Fenton 1,542 Posted February 14, 2014 Relieve the gearbox casing, don't touch the diff. A small belt sander is ideal for the job. Share this post Link to post Share on other sites
A1AXX 26 2 Cars Posted February 16, 2014 Yea tom, just got the dremel on it. All fits fine now. My next question is about how stiff the diffs feel when test fitted and the casing bolted together. Normal I guess? Both the old and new are stiff to turn! Share this post Link to post Share on other sites
pip470 61 Posted February 16, 2014 Stick a shaft in and try and turn it, there not that stiff to turn. If it is stiff, its locked up somewhere and still binding. Share this post Link to post Share on other sites
A1AXX 26 2 Cars Posted February 18, 2014 Hi pip, It's definately bit binding any more, I actually refitted an old diff to test it out, to be honest it does the exact same thing. Bearing in mind there no sealant either Share this post Link to post Share on other sites
A1AXX 26 2 Cars Posted February 20, 2014 Okay, In the end I found that the diff was still actually rubbing the casing, so no issues, it's all nicely seated and feels good. I researched online about tapered bearing diff preload torques. I found some data for Honda gearboxes (okay not the same, but certainly the same idea). So worth bearing this in mind if you decide to fit an LSD to an Ma5 gearbox, or other. I have found that my assembly, WITHOUT sealant has a starting torque of 4Nm with the new bearings. I had some tight spots at 10Nm where the casing rubbed. I have now ground the high spot out of the casing and I'm good to go. I measured this starting torque using a torque wrench, and a socket glued into the diff, not ideal, but it does the job! I spoke to Quaife again today about it, and they were happy with that. According to the guide, they look for 2.7-4Nm of starting torque with new bearings, and 2.5-3.7Nm when you reuse the old tapered bearings. See the pic below. I love to hear about anyone's opinion on all of this Thanks Josh Share this post Link to post Share on other sites
christopher 5 1 Cars Posted October 3, 2022 @joshWas this a trans X diff or a quaife one you fitted? Have you got it to work properly? What box did you use as a base? Share this post Link to post Share on other sites
