changing rearend gears...

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rod196202

New Member

Aug 3, 2005

44

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0

Aug 20, 2005

#1

• Aug 20, 2005

• #1

I want to change from stock to 355 or 373 i have aod in a 93 vert transgo shift kit the motor is stock but slowly changing k&n fender mount 65mm t/b msd dis. coil wires eibach lowering springs koni adj. equ/l headers o/r x super 40 flows b&m hammer 17in cobras 245x40s intake and heads are comming soon $$$ what would be good set up ? and should gears be my next mod??? thanks

 

Foxfan88

My Grandpa has great wood.

Sep 13, 2004

2,487

4

0

Miami, Ok

Aug 20, 2005

#2

• Aug 20, 2005

• #2

i dont think 355s are quite enough for an AOD. i would say 3.73 MINIMUM. I would try a 3.90 set or maybe you could consider 4.10s

The highway rpms are like 1-200 apart from each gear so yeah...you might notice a loss in mileage when on the highway for long periods at a time. But i think the performance gains will far outweigh the mileage loss.
your intown milage shouldnt change, it may even get better, you will get to use your O/D a little more instead of that 3rd- OD-3rd OD shift all the time.

A little less strain on the motor also. your car will actually use the gear to move and not luggin it around with a hghway gear like the 2.73s.

 

bubba-dough

Active Member

Dec 28, 2004

1,044

2

38

Indiana

Aug 20, 2005

#3

• Aug 20, 2005

• #3

In my opinion: @ least 3.73 with an AOD. I'd go deeper though...

 

8

87'GTstang

New Member

Feb 16, 2004

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0

Aug 20, 2005

#4

• Aug 20, 2005

• #4

The trend seems to go like this
5.0:
manual = 3.55
auto = 3.73
4.6:
manual = 3.73
auto = 4.10

Most seem to be happiest with ratios of about this and these ratio combinations are a good compromise between mileage and performance increase.

 

R

rod196202

New Member

Aug 3, 2005

44

0

0

Aug 20, 2005

#5

• Aug 20, 2005

• #5

rod196202 said:

I want to change from stock to 355 or 373 i have aod in a 93 vert transgo shift kit the motor is stock but slowly changing k&n fender mount 65mm t/b msd dis. coil wires eibach lowering springs koni adj. equ/l headers o/r x super 40 flows b&m hammer 17in cobras 245x40s intake and heads are comming soon $$$ what would be good set up ? and should gears be my next mod??? thanks

Click to expand...

Thanks that helps a lot
one more thing who makes a good set of gears im on a budget...

 

PeteyAce

Member

Jul 2, 2004

346

0

17

Aug 20, 2005

#6

• Aug 20, 2005

• #6

are you putting them in yourself?

 

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rod196202

New Member

Aug 3, 2005

44

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Aug 20, 2005

#7

• Aug 20, 2005

• #7

PeteyAce said:

are you putting them in yourself?

Click to expand...

not sure?? depends on $$$ whats in volved

 

S

slow84lx

clean it good before insertion

Jul 3, 2005

372

180

63

Dallas, TX

Aug 20, 2005

#8

• Aug 20, 2005

• #8

It doesn't only depend on $$$$$.....much more depends on your skill level and whether you have all the tools needed to do the job correctly the first time. If you have to have it redone with another set of new gears because the first set got chewed up it will cost you a lot more $$$$ than it will having it done by a pro in the first place. BTW....there are many good gear companies but most people that I come in contact with recommend using Ford gears or FRPP. I'm sure that there must be some reason why so many people use them. I got some myself for an upcoming gear change. Good luck with yours.