91 Gear Swap Help

91cobra5.0 · January 11th, 2008, 12:40 AM

true i dont know much but who said that ive been ignoring those links, im doin research as i get time, and if i dont ask questions and jump right in and just do it then i could see messing it up but its not like im doin them right now, and still my question goes unawnsered about the shims for the pinion, i know its gotta be within +/- .002 of the pinion dimensions and that the pinon preload and backlash are important and that the sipder gears have to seat right as well as the ring or else they will knock 2gether and break teeth......

do the shims have to snig up against the pinion shaft or are the shims ok if they fit around the shaft with a little extra room?

ryans88gt · January 11th, 2008, 12:42 AM

You use pinion shims designed for shimming the pinion.

ryans88gt · January 11th, 2008, 12:45 AM

eBay Motors: 3.73 GEARS & REBUILD FORD 8.8" MUSTANG MOTIVE GEAR (item 290196864484 end time Jan-18-08 16:51:54 PST)

Here is a complete kit with everything you need including new axle bearings and seals, carrier and pinion shims, carrier and pinion bearings, crush sleeve, pinion nut, gears, etc...

Then you only need the tools...that is the expensive part.

91cobra5.0 · January 11th, 2008, 06:44 AM

the pinion depth has to be within +/- .002 off the dimensions but still, do the shims have to fit tight arounf the pinion? and i am working on the research

ryans88gt · January 11th, 2008, 10:56 AM

They need to be the shims made specifically for shimming the pinion...ya dig?

If you got some shims laying around that have a slightly bigger hole....NO... you can't use them.

It isn't worth doing if you aren't going to do a complete rebuild kit. So just buy a complete kit. THe link I posted above is a cheap complete kit, quit trying to cut corners or you will not be happy with the results.

e3sean · January 11th, 2008, 01:00 PM

get the video watch the video if u are confident then do it if your not then dont....

watch this...

YouTube - Setting pinion bearing preload on the Ford 8.8" axle

91cobra5.0 · January 11th, 2008, 06:51 PM

Originally Posted by e3sean

get the video watch the video if u are confident then do it if your not then dont....

watch this...YouTube - Setting pinion bearing preload on the Ford 8.8" axle

seen that video of setting the pinion preload, also i break down like u guys say and get that 50$ rebuild kit, brenspeed is who i bought those dange gears from ne way

91cobra5.0 · January 11th, 2008, 06:52 PM

ok different project then, putting in a new clutch, wt do u guys thing about that, the guy i bought the car from gave me a racing clutch with it, brand new in the box, he also game me 2 bearings and a new clutch fork

ryans88gt · January 11th, 2008, 08:32 PM

That is easier if you have some help removing the trans. The only specialty tools you need are a torque wrench and an alignment tool. If you are going to replace the pilot bearing (recommended), then you need a puller or a slide hammer (you can rent them for free from autozone).

e3sean · January 11th, 2008, 09:17 PM

Originally Posted by ryans88gt

That is easier if you have some help removing the trans. The only specialty tools you need are a torque wrench and an alignment tool. If you are going to replace the pilot bearing (recommended), then you need a puller or a slide hammer (you can rent them for free from autozone).

well its kinda free u have to pay for it but you get your money back when u return it.

e3sean · January 11th, 2008, 09:17 PM

Originally Posted by 91cobra5.0

seen that video of setting the pinion preload, also i break down like u guys say and get that 50$ rebuild kit, brenspeed is who i bought those dange gears from ne way

ok but have u seen the whole video? thats just a clip from the full video.

91cobra5.0 · January 12th, 2008, 12:01 AM

na havent seen the whole video, but yes he gave me both bearings to put in and the clutch fork as well as the clutch and pressure plate and all of it is still in its boxes, and i have access to lifts, tranny jacks, u name it they probly got it and its only 5 bucks an hour as well as help from ex-mechanics

problemCOBRA94 · January 12th, 2008, 01:15 AM

Is the current clutch bad? does it slip? why replace it? You go from gears to a clutch. Why would you think of gears if it needs a clutch. If you just want to launch harder, I guess put in a bad ass clutch. But that is all you are going to get out of a clutch. And why would you need a new fork?
If you are after performance, I probably would just do the gears. I did mine. So far Ryans88GT is right about everything pertaining to the gears. I have 4.10 gears and they are a bit much though.
It is a bitch of a job that may take trial and error. I had to do mine twice to get the pinion depth right. Even being off the slightest bit wont work. It will make loud noises, grind the gears, break them, break your axle housing, etc. Do your homework and you should be ok though. also, with gears, get All NEW bearings.
You won't get much performance out of a clutch except for launching hard.

e3sean · January 12th, 2008, 02:57 AM

Originally Posted by 91cobra5.0

na havent seen the whole video, but yes he gave me both bearings to put in and the clutch fork as well as the clutch and pressure plate and all of it is still in its boxes, and i have access to lifts, tranny jacks, u name it they probly got it and its only 5 bucks an hour as well as help from ex-mechanics

hmm are you in the military??

91cobra5.0 · January 12th, 2008, 09:55 AM

Originally Posted by e3sean

hmm are you in the military??

yes, and they current clutch does slip, its gettin pritty rough getting in first, to were i cant let it out unless im around 2k rmp or it will kill it and i got all that stuff when i bought the car they guy gave it to me so pretty much it was free. and next weekend ill do the gears

88skirtdragger · January 12th, 2008, 03:36 PM

me and a buddy did mine and I was a noob to gears my self. I bought the kit that ryan posted above and I had a shop press the stuff for me for a charge of 5 bucks lol. Pretty straight forward and mine came out perfect.I installed the t lok rebuild kit at the same time. If your's looks bad like mine a recomend it. Stoped the one wheel wonders for me

e3sean · January 12th, 2008, 05:55 PM

Originally Posted by 91cobra5.0

yes, and they current clutch does slip, its gettin pritty rough getting in first, to were i cant let it out unless im around 2k rmp or it will kill it and i got all that stuff when i bought the car they guy gave it to me so pretty much it was free. and next weekend ill do the gears

ya u said that u can rent a lift and tools for 5 an hour the only place i know u can do that is at a hobby shop on base.what base are you at??/branch? anyway if some of the mechanics there will help u do your gears and clutch go for it..let us know how it works out.

January 11th, 2008, 12:42 AM	#22
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	You use pinion shims designed for shimming the pinion. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

January 11th, 2008, 12:45 AM	#23
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	eBay Motors: 3.73 GEARS & REBUILD FORD 8.8" MUSTANG MOTIVE GEAR (item 290196864484 end time Jan-18-08 16:51:54 PST) Here is a complete kit with everything you need including new axle bearings and seals, carrier and pinion shims, carrier and pinion bearings, crush sleeve, pinion nut, gears, etc... Then you only need the tools...that is the expensive part. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

January 11th, 2008, 10:56 AM	#25
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	They need to be the shims made specifically for shimming the pinion...ya dig? If you got some shims laying around that have a slightly bigger hole....NO... you can't use them. It isn't worth doing if you aren't going to do a complete rebuild kit. So just buy a complete kit. THe link I posted above is a cheap complete kit, quit trying to cut corners or you will not be happy with the results. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

January 11th, 2008, 08:32 PM	#29
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	That is easier if you have some help removing the trans. The only specialty tools you need are a torque wrench and an alignment tool. If you are going to replace the pilot bearing (recommended), then you need a puller or a slide hammer (you can rent them for free from autozone). __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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January 11th, 2008, 12:40 AM	#21
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	true i dont know much but who said that ive been ignoring those links, im doin research as i get time, and if i dont ask questions and jump right in and just do it then i could see messing it up but its not like im doin them right now, and still my question goes unawnsered about the shims for the pinion, i know its gotta be within +/- .002 of the pinion dimensions and that the pinon preload and backlash are important and that the sipder gears have to seat right as well as the ring or else they will knock 2gether and break teeth...... do the shims have to snig up against the pinion shaft or are the shims ok if they fit around the shaft with a little extra room?

January 11th, 2008, 06:44 AM	#24
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	the pinion depth has to be within +/- .002 off the dimensions but still, do the shims have to fit tight arounf the pinion? and i am working on the research

January 11th, 2008, 06:52 PM	#28
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	ok different project then, putting in a new clutch, wt do u guys thing about that, the guy i bought the car from gave me a racing clutch with it, brand new in the box, he also game me 2 bearings and a new clutch fork

January 12th, 2008, 12:01 AM	#32
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	na havent seen the whole video, but yes he gave me both bearings to put in and the clutch fork as well as the clutch and pressure plate and all of it is still in its boxes, and i have access to lifts, tranny jacks, u name it they probly got it and its only 5 bucks an hour as well as help from ex-mechanics

January 12th, 2008, 01:15 AM	#33
problemCOBRA94 Regular 1994 Mustang Cobra it runs now. Kinda... Join Date: Mar 2007 Location: Rocklin, ca Posts: 72 iTrader: 0 reviews	Is the current clutch bad? does it slip? why replace it? You go from gears to a clutch. Why would you think of gears if it needs a clutch. If you just want to launch harder, I guess put in a bad ass clutch. But that is all you are going to get out of a clutch. And why would you need a new fork? If you are after performance, I probably would just do the gears. I did mine. So far Ryans88GT is right about everything pertaining to the gears. I have 4.10 gears and they are a bit much though. It is a bitch of a job that may take trial and error. I had to do mine twice to get the pinion depth right. Even being off the slightest bit wont work. It will make loud noises, grind the gears, break them, break your axle housing, etc. Do your homework and you should be ok though. also, with gears, get All NEW bearings. You won't get much performance out of a clutch except for launching hard.

January 12th, 2008, 03:36 PM	#36
88skirtdragger Newbie Join Date: Nov 2007 Posts: 11 iTrader: 0 reviews	me and a buddy did mine and I was a noob to gears my self. I bought the kit that ryan posted above and I had a shop press the stuff for me for a charge of 5 bucks lol. Pretty straight forward and mine came out perfect.I installed the t lok rebuild kit at the same time. If your's looks bad like mine a recomend it. Stoped the one wheel wonders for me

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