overdrive gears available soon

[tlib]

Proformance 4.90 and .69 OD ???

Tom,

I currently have 4.90 gears on my bobbed M-35. I run Goodyear MV/T tires.

Question ? What do you think the proformance will be if I add the .69 OD

gears to the tranny ? Thanks !!!!

 

[spicergear]

Hmmm...you'll need to be more specific since my name is Tom as well.

You'll need a LOT of engine to pull 4.90's and that tall overdrive. Also, what's the Goodyear tire height so the info can be calculated better? Randy's Ring and Pinion, link below will allow you to put in your ratio's and figure out rpm for mph. For final drive ratio you will need to put a 0 then the decimal point like 0.69...or whatever overdrive you want to figure.

Randy's Ring & Pinion. Calculators.

 

[mudguppy]

even with near-stock tires, i don't think the stock motor will have enough cohone's to run a 3.38 final drive (0.69x4.90).

 

[m-35tom]

even with stock tires, and stock transmission, it is hard to believe there is enough power.
9.00-20 tires would be 1925 rpm at 60. .69od is all the motor can handle, and that is a final ratio of 4.64. you are talking about a final ratio of 3.82, it's not gonna happen.

tom

 

[m-35tom]

quite a bit of diversity going on, of the 8 sets sold, 3 are going in m-37, 1 in a m-715, 2 in a stock deuce, 1 in a deuce with a lds, 1 in a bobbed deuce, and 1 in a deuce with a 8.4 cummins.

tom

 

[JDToumanian]

I see Walck's is out of the 0-70 mph speedometers...... I found them at Vintage Jeeps, Inc. for a little cheaper and they're in stock.

Vintage Jeeps,Inc. Parts & Jeep Accessories From The Jeep Parts Experts.

It's part number 640131 for $77.10

*** I just noticed that their part #640131 is listed as 0-60 mph. Part #640131 should be 0-70 but you may want to make sure. Also, Walk's (the link from Tom's website) shows them back in stock now. ***

I'll be ordering my .69 OD kit soon.... I've been pouring a lot of money into my deuce lately, and the OD kit is next but it may be after Tower Park before I have the money. I have a busy schedule with my deuce this year, air shows, convoys, parades, camping and shooting trips. To prevent haste causing waste, I'm going to rebuild a transmission at my leisure and swap it for the one in my deuce when it's ready.

Jon

 

[mudguppy]

sounds like 9 sets sold?

 

[tlib]

Proformance 4.90 and .69 OD ???

Tom,

Sounds like I should use your .69 on my stock Deuce with Goodyear MV/T

tires (48") and leave the bobbed deuce alone with the 4.90 gears and Goodyear

MV/T tires (48") ? I could compare them for RPM'S,SPEED,ETC. ???

What do you think ?

Thanks !!!

 

[m-35tom]

yes, 9 so far. including mine.

48" tires are going to be a bit big for .69 od.
i reccomend not larger than 11.00 x20 or 14.5R20XL

tom

 

[OPCOM]

_____Diesel Fitter !_____

For Cool and Useful Modifications to a Large Diesel truck,

As Judged Unanimously by the Grand Visier of PBR Welder Hacks,

The Covetous and Rarefied Diesel Fitter Award is Hereby Bestowed Upon

m-35tom​

 

[m-35tom]

#10 just sold, 20 more in stock and 50 ready to be made.

 

[TexAndy]

Hmmm...you'll need to be more specific since my name is Tom as well.

You'll need a LOT of engine to pull 4.90's and that tall overdrive. Also, what's the Goodyear tire height so the info can be calculated better? Randy's Ring and Pinion, link below will allow you to put in your ratio's and figure out rpm for mph. For final drive ratio you will need to put a 0 then the decimal point like 0.69...or whatever overdrive you want to figure.

Randy's Ring & Pinion. Calculators.

There's another good calculator here:

4Lo.com :: Final Gear Ratio, Crawl Ratio, Tire Size Calculators

 

[Sephirothq]

Dumb question,

If one was able to get ahold of a Spicer 3153 would it be a good idea to pull the gears out of it for an overdrive setup?

 

[m-35tom]

that is a big IF, the answer is maybe. you would still have to change the mainshaft to use needle brngs for 2nd or it WILL fail. you would also have to make spacers to be able to use the civi gears as they are not a direct fit.

tom

 

[Sephirothq]

I am 90% sure i have one sitting in a garage since the 70's.

 

[03silverado]

Will this work with the M809 series 5 tons or just a deuce thing?

 

[jwaller]

Will this work with the M809 series 5 tons or just a deuce thing?

its just a deuce thing. if you want more speed with a 5 ton do tires or a 939 transfer case.

 

[03silverado]

Thank you

 

[resqur]

Great thread....i'm in for a set as soon as I can pull down some overtime at work....

 

[jimh1985]

Has anyone had problems with lugging the motor with these? i Would thing shifting from 4th to 5th is a prob.
This is what has kept me from trying them.