tnmotown

Ok my mods are in my sig and i just put a new tranny in, but it came from a '93 Z28. Now i heard the gears are shorter inside the tranny and with the 4.10's that i already have, it seems like i spin too much through 1st and 2nd. Also my RPM's used to be around 2200 at 75mph and now its close to 3000RPM's.

My question now is my buddy has a '97 camaro SS with a 6 speed and believe he has the 3.42's. So we are thinking about swapping since he wants 4.10s and i can downgrade and go with the 3.42's. (it kinda would be like 3.73's with the 94-97 trannys)

The reason is i went to the track yesterday and hit a 13.2 at 112MPH with a crappy 2.4 60ft. No traction and track temp (114 degrees!) killed.

Anyways would the 3.42's be good for the '93 tranny that i have? what are some of your guys inputs??

Crows89RS

Is it a 6 speed or an auto? If it's an auto, 4.10's are too low of a gear. You'll be shifting into OD before the 1/4 mile marker. If it's a 6 speed, I know of TONS of guys running 4.10's with the 6 speed. If you're running an auto, go with either 3.42s, 3.73s or 3.90s. I think with 3.90's you'll be redlining right as you pass the traps.

NVetro

93 t56 trans are WELL known for being rather weak, not sure if constant abuse at a track with 4.10's will be very good for it. Call t56rebuilds and they will tell you all about 93 t56's, they won't wort on them. Not sure about the whole gear ratio thing.

tnmotown

it is a 6 speed and i pass through the traps in 4th gear. Its just that 1st and 2nd i spin through too quick. Then on the highway at 70mph im around 3000RPM which i dont like. I use to be around 2200 with the other tranny and 4.10's.

Im thinking with my '93 tranny i could use 3.42's and would be equilvalent of 3.73's and the 94-97 tranny's

11secgen

i think i remember reading on here that the 93m6 had a diff. gear ratio.im not sure if youd be able to hurt it even with 4.10s as long as it doesnt hook.i say get some relocation brackets,a adj torque arm(tunnel mounted) and some drag radials,get it to hook and if it blows throw a differant trans in it.dont sell a monster like that short!

axehead

i have a 93 m6 with 4.11's in a 12 bolt in my car & had a shop put the 5th & 6th gear from a 95 tranny in my 93. i cruise on the interstate at 75 with only 1800 rpm.

my 93 m6 ratios were

1-2.97
2-2.07
3-1.43
4-1
5-.8
6-.62

94 & up m6 ratios are

1-2.66
2-1.78
3-1.3
4-1
5-.74
6-.5

my current m6 ratios after 5th & 6th were replaced from a 95 tranny

1-2.97
2-2.07
3-1.43
4-1
5-.74
6-.5

i love this combo, i have cut low 1.7 60' at the strip with mt et street radials & have gotten 26 mpg with ac on during an 8 hour road trip. there was another 93 tranny that had a 3.36 1st gear. do a search for m28 & m29, those are the two trannys for 93. i'm not sure if mine is the m28 or m29. if you have an extra 94 or up tranny, i suggest putting the 5th & 6th gears from it into your 93 which is giving you the best of both like mine

karpetcm5

Im the one who posted the tranny ratios and said it was different, which was originally posted a while back by another member. The 93 Tranny is weak cant handle power, dont take my word for it ive called SEVERAL tranny shops who will suggest to seriously buy another year model which i did. DO NOT GO TO 3:42's I did that from my 2:73's yes my 6speed came with 2:73's factory 93 with my gear box. You will bog in 3rd, 4th and 5th gears even though your tranny has short gearing. I went to 4:10's and luanched my car in 2nd gear and yes i do know what you mean at 70 you are about 3000rpms. You can go down to 3:73's but take my word ive done this several times and have had the same exact tranny, you will bog in 3rd and above when you shift and youll be out of your power range despite thinking its soo short with 4:10's it will be perfect with 3:42's and it wont. Ohh and now i have a 6speed from a 95 Z lol with my 4:10's the gears are too wide now, which i knew it would happen but this wide. How that happened dont have a clue at 65mph im at 2100rpms with 4:10's kinda suspect.

Q: What are the stock transmission gear ratios and torque capacities?

A: The following were available by year:

Year Model/Optn 1st 2nd 3rd 4th 5th 6th Final
---- ------------- ---- ---- ---- ---- ---- ---- -----
1993 Manual/M28 3.36 2.07 1.35 1.00 0.80 0.62 2.73 (GU2)
1993 Manual/M29 2.97 2.07 1.43 1.00 0.80 0.62 3.23 (GU4)
1993 Auto/MX0 3.06 1.63 1.00 0.70 -- -- 2.73 (GU2)
1993 Auto/MX0 3.06 1.63 1.00 0.70 -- -- 3.23 (GU5)

1994 Manual/MN6 2.66 1.78 1.30 1.00 0.74 0.50 3.42 (GU6)
1994 Auto/MX0 3.06 1.63 1.00 0.70 -- -- 2.73 (GU2)
1994 Auto/MX0 3.06 1.63 1.00 0.70 -- -- 3.23 (GU5)



http://www.cardomain.com/ride/523091

tnmotown

well it looks like i better save up down the road for a 94-97 tranny and get rid of this on. It does seem to bog in 4th, 5th and 6th even with 4.10's in right now.

Right now on the highway around 70mph, its like i can start picking up in 6th gear whereas last tranny i picked up great in 5th

well, who knows what to do now.......

karpetcm5

Well unless your pushing alot of power and you dont shift too hard meaning overshift which this model year is notorious for, your orite but reading the list of your mods not exactly lightly modded. Its a good tranny but every shop i spoke to said they wont rebuild or that its not a good idea unless my car is stock or lightly modded i asked why and they gave me a list lol. Thats when i said F it im gonna buy a used one 94-97. My tranny failed with 392rwhp and 434rwtq not a lot of power at all but too much for the 93 gear box. Just drive it till something happens and make sure you have a pro 5.0 shifter or a shifter that you can set your bump stops if you shift hard especially when racing you will eventually overshift and get it stuck in gear, i wish i took that advice sooner because just as one of the tranny shops told me to make sure to buy a shifter with bump stops a few days later i overshifted into 4th and thats all she wrote stuck in 4th gear couldnt kick it out of gear if i wanted to lol ohh and thats the second time the 93 gear box failed. The first time it failed or had problems, wouldnt go into 5th or reverse and sometimes 1st would be a struggle. I do wanna say i dont want to depress you in anyway it is a good tranny 1st and 2nd gear when driving around town are fun gears and if you dont bash on it too much you should be ok for a while.

* 26-spline input shaft (GM)
* 31-spline input shaft (Dodge)
* 400 ft·lbf torque capacity (1993 F-Body)
* 450 ft·lbf torque capacity (GM, except 1993 F-Body)
* 600 ft·lbf torque capacity (Dodge)
* 385 ft·lbf (522 N·m) (GM MM6)
* 400 ft·lbf (542 N·m) (GM M12)



http://www.cardomain.com/ride/523091

1 DWN CAM

You may want to revise the second asterik. The viper boxes come with a 31 spline output shaft and a 26 spline input.

karpetcm5

its just a copy and paste from a site that i found, but as far as the tranny torque ratings go it should help out a bit

tnmotown

so with the '93 tranny in my car, would it be a good idea to swap over my buddies rear-end from his '97 SS (he has the 3.42').

I like the 4.10's right now, but with the tranny being shorter geared and my new motor, its just too much in 1st and 2nd. Also want to bring my RPM's down on the highway.

If i had 3.42's with my tranny what do you think my RPM's would be around 75mph?

karpetcm5

If you want gas mileage and rpms low then go for it, but you will bog in 3rd gear and up. Ive had 3:42's with the gear box you have.

tnmotown

you think i still will bog in 3rd and higher gear, even with my supporting mods right now?

karpetcm5

Well all i can say is with the mods i have without nitrous it would bog in 3rd it would irritate me to the point were i changed it. I didnt use nitrous to get up to 392 rwhp and 434rwtq to know wether it would bog with that power. But either way you look at it you still wanna be higher in the RPM's, get there quicker and stay there longer with the 4:10's. If 1st and 2nd are too short, i luanched mine in 2nd gear with a good clutch you can easily do it no nitrous 289 rwhp. I think with the gear box we have(which i no longer have went to a 95 6speed) i know there is hardly much difference but 3:73's wouldve been a perfect gear. But if your getting 3:42's cheap or free then put it on if you dont mind paying for the labor costs and see how you like it it will solve your 1st and 2nd gear issues, ohh and by the way 3rd gear with 3:42's was bogging on me with the same gear box you have shifting at 6300 rpms i raised my limiter. Now that i have a 95 6speed in my car with the 4:10's i have the gears are too wide lol. By the way all the advice im giving your or opinions is all with my Original 93 6speed gear box which is what you have. I just recently in the past month went to a 95 6speed.