BitViper

iTrader: (63)

Yeah I think so..the 10 bolt is teh stock M6 size is it not?

Or is my head up may *** again!

TDP

iTrader: (23)

I've never heard of 3.90's for a 7.5" 10-bolt. I've installed Motive 3.90s in C5/C6 Vettes, Mustangs, 12-bolt & 9 inch, but that is it. If they do make them for a 7.5, that would be really nice!
Do you have a link?

mzoomora

iTrader: (36)

They are out there, fairly new. They came out about a year ago or so.

99zman

iTrader: (23)

i just ordered my motive 4:10's from texas speed along with a ta gridle, stud kit, and complete install kit. they said the only motive gears the sell are in the blue and black box. i called motive and they said i will not have any problems with these gears the only difference he said is that they performance gears are tripple lapped, some coating to make them a little quiter. but he did reccomend a solid pinion spacer. so i guess i have to order that now too? and he said that break in is 750 miles

TDP

iTrader: (23)

I just picked up the new Motive catalog, and it explains the difference. The orange box Motive performance gears are made of a harder, higher quality 8620 steel, where the blue box Motives are not.
Also, it DOES have a listing for the 3.90 ratio


Don't worry about the solid pinion spacer. However, I recommend a GM crush sleeve, NOT the one in the kit. The one in the kit crushes way easier than the GM one. It seems to be that if it takes more effort to crush, that it would be more solid.

99zman

iTrader: (23)

well what should i do with the gears then? i bought them as their ring and pinion package? i only want to do this once? i already ordered a solid pinion spacer .why wouldn't you want to use that? that's as solid as your gonna get.

99zman

iTrader: (23)

i called texas speed they are going to drop ship some motive performance gears to me and when i get mine in all i have to do is send the black and blue motives back to them. what a great place texas speed is.. i'm very pleased so far with them. great prices and customer service to boot.

SMOKKINU

iTrader: (4)

hopefully, you mean to the scrap yard, along with your 10 bolt, and straight home to order a 12 bolt from strange?

Ls1Bait

I run motive gears and an Auburn posi unit, and pull 1.7x 60 ft. all the time.

mzoomora

iTrader: (36)

The material (8620) is the same for all the motive gear non-pro gear stuff, but the performance stuff is "cleaner". Either will be fine as long as they are set up properly. The performance stuff is easier to set up though and are less prone to noise.
Although we didnt get a lot of the blue box gears back either.

98camaroLS1M6

iTrader: (35)

motive gears are the quietest gears you can get on a budget, my buddy has them in his 10bolt and loves them.

99zman

iTrader: (23)

thanks for the info that makes me feel a lot better. im getting the performance gears anyway. mzoomora, do you or did you work for them or something? thanks again

mzoomora

iTrader: (36)

I worked for the full time for about 6 years, and part time after I joined the fire department for another 6 until recently. Could probably go back but I got a better side job. It was a great place to work for though, and they do make a great product. Most people dont realize how many other gear "brands" are actually just reboxed Motive stuff. Cant tell you who, but the point is there stuff is proven and everywhere. Has been used in NASCAR, ARCA, NHRA, IHRA, NMRA, on and on.

99zman

iTrader: (23)

thanks mzoomora. so the 750 mile break in thing is true then? i hear alot of people say 500 miles, what would you say? 750 miles is a long time not to get on the gas and try those puppies out????????

y2k_ta

iTrader: (80)

Find a new mechanic. I have Motive 3.73's in my A4-equipped 'bird, and they're great.

mzoomora

iTrader: (36)

Get a few heat cycles in them and allow them to cool without any extended highway driving. New bearings and gears generate a lot of heat, that is why you cycle them. I have done 3 cycles (drive 15-20 minutes of stop and go or slow cruise, then cool for a couple of hours) and taken them to the track, but you should probably do at least a couple of hundred miles. For a tow vehicle or heavy vehicle the break in is crucial.

99zman

iTrader: (23)

thanks alot, i have 2 more questions. first what weight oil would you reccomend the 75/90 or the 85/140 non synthetic what are the advantages of both weight oils. second is a solid pinion spacer worth it to install? thanks again for the help.

mzoomora

iTrader: (36)

Yes on the solid spacer, helps a lot with deflection. As far as weight of lube, depends on climate and conditions. The heavier oil is good for high temps the lighter stuff is good for cold. I usually run lighter weight lube with limited slips myself, but it is best to go with what the diff manufacturer says (auburn, torsen etc.)

BriancWS6

iTrader: (18)

I have had no problems with them in my car.

mach2004

Good quality gear, mine nearly always have a whine on decell. Other that that they are great.