I own an 07 gt stick - I have it up on jack stands to do the exhaust - and I was thinking - why not buy a rear end gear kit from Ford racing since it's up there...I've looked through a lot of the threads....I'm leaning towards the 4.10's instead of the 3:73's ....I've got a guy who does gear work daily for the install...I know to buy the "A" type made by ford...but what does this really do compared to running the stock gears...I'm putting in shorties b/c I live in az (emissions) and an off road H pipe....I've got mutha- thumpers on my work bench going in....then a cold air ...and then off to get a professional dyno tune....this not a Daliy driver...are the 4.10's better than the 3.73's?....quicker off the line ..racing stop light to light but able to run ok on the highway...is what I'm looking for ...no drag strip ..no fuel economy...I know it's a tired question...just would like to know what everyone thinks...thx
Rear Axle gear help needed
- Thread starter chgovfk
- Start date
-
Sponsors (?)
GOLDENPONY
Founding Member
GOLDENPONY
Founding Member
walter
Founding Member
Basically you answered your question.
Want a quick car and don't care about MPGs or top end? 4.10s
You'll really want those if you're working up your cams. With more revs you won't lose top speed
Want a quick car and don't care about MPGs or top end? 4.10s
You'll really want those if you're working up your cams. With more revs you won't lose top speed
Tanus
New Member
I love my 4.10s and Ive tried a bunch of set-ups too; 3.08, 3.55, 3.73 and 4.10.
I have a 90 w/ 5 speed and it will cruise 75 mph perfectly, only like 2k-2.5k rpms. I live in AZ too, so as you know, 75 is about as fast as you wanna cruise with all the speed cameras.
Also if you know the guy installing, have him pack the posi as tight as possible, most shops wont do this cause its kinda a pain in the ass (have him put in all the shims, then install, pin probably wont slide through, pull it out, stick in a smaller shim(s), try again until its as tight as possible) rear-end will be super tight, pretty much will be just as good as a locker, but for free!
pay attention too, that way next time you can just do it yourself. Ive done like 8-10 R&P installs.
*this is assuming your rear is a similar to fox 8.8s, which it probably is*
I have a 90 w/ 5 speed and it will cruise 75 mph perfectly, only like 2k-2.5k rpms. I live in AZ too, so as you know, 75 is about as fast as you wanna cruise with all the speed cameras.
Also if you know the guy installing, have him pack the posi as tight as possible, most shops wont do this cause its kinda a pain in the ass (have him put in all the shims, then install, pin probably wont slide through, pull it out, stick in a smaller shim(s), try again until its as tight as possible) rear-end will be super tight, pretty much will be just as good as a locker, but for free!
pay attention too, that way next time you can just do it yourself. Ive done like 8-10 R&P installs.
*this is assuming your rear is a similar to fox 8.8s, which it probably is*
Thanks all.....I'm ordering the 4.10's Frpp "A" from american muscle...does that really work ....about "locking up" the shims for a locker rear end in an 07?....the extra work wouldn't be a problem...
The installer is a neighbor ...used to wrench for a winston west cup team....although he only likes chevies...but loves spinning wrenches...and drinking the budweiser I buy him....we are tackling this as soon as my H - pipe comes in the mail....so any comments would be helpful.....
Then the real scary part begins....after exhaust - and the rear end ....I plan to run it a while....then the cams/cold air intake......I've downloaded everything possible about popping those mutha thumpers in....along with the Livernois lock-outs....I'm spraying the cam gears (taped off in half) bright yellow..and then with paint pens...I'm marking every sprocket tooth and where it lands on the chain.....I still shi*t myself thinking about it.....the car only has 12K on it....ugh....if I F it up...my wife will never let me hear the end of it......I'll really take my time and it will work.....I've completed the install..."in-my-head" a hundred times......so hopefully God will take some mercy on my silly ass....
The installer is a neighbor ...used to wrench for a winston west cup team....although he only likes chevies...but loves spinning wrenches...and drinking the budweiser I buy him....we are tackling this as soon as my H - pipe comes in the mail....so any comments would be helpful.....
Then the real scary part begins....after exhaust - and the rear end ....I plan to run it a while....then the cams/cold air intake......I've downloaded everything possible about popping those mutha thumpers in....along with the Livernois lock-outs....I'm spraying the cam gears (taped off in half) bright yellow..and then with paint pens...I'm marking every sprocket tooth and where it lands on the chain.....I still shi*t myself thinking about it.....the car only has 12K on it....ugh....if I F it up...my wife will never let me hear the end of it......I'll really take my time and it will work.....I've completed the install..."in-my-head" a hundred times......so hopefully God will take some mercy on my silly ass....
GOLDENPONY
Founding Member
Hopefully your neighbor knows how to set up an 8.8" rear end. They can be noisey if not set up right. Best of luck. Let us know how it goes. 
