Auxilary Transmission

[DodgeMan]

I happen to look at the auxilary transmission in my LJ tonight, i always thought it was a spicer turns out its a white transmission. White Motor Co.

Anyone got any info on these transmisiions?

First number is 80310 or 80310.

Second number is 4?8847 or 4?0847

And at the bottom is has 12HP stamped on the tag.

Its a 3 speed devorced auxilary.

I believe if the tag in the truck is right it is a lo direct and over trans.

Any help greatly Appreciated...

Thanks Paul

[David]

Are you sure it's not 8031C. That would be a Spicier number. There was a time when White put their name on anything they sold. Like "White" Freightliner and "White" Western Star.

[DodgeMan]

Could be it says white really big on the tag (tag is red) and under white it has White motor co.

Ill see if i can grab a pic tomorrow of the tag and the box... Thanks Paul

[BOB DINGSDALE]

if its a 8031 C it has the big OD in 3rd..73 or .75.1st is deep under direct in 2nd.If you have the tr 720 main .78OD in 5th and a higher than 9.02 rears your going to do alright.The 7.32 is the ones I would like but have the 9.02s...78 with .813 in a box I can do 50 now.1100x22 s deep lug tires

[DodgeMan]

I`m going to get info off of the main and photos of the auxilary tomorrow on the LJ. And double check the main and auxilary on the B81 for any numbers.

While we are on this subject can anyone send me a photo of the cross section of the 8031 case?

And i found a 6041 spicer would that hold up as a od trans behind a quad box?

And has anyone else besides David and i thought about mounting a auxilary box backwords to get more OD speed?

Can this be done if you make special linkage?

Thanks Paul

[BOB DINGSDALE]

It was done in the late 50s or early 60s and worked.then man.put different ratios in mains and a boxs so that you different have to.don't know if you could get flanges for the bigger drive shafts.

[DodgeMan]

It was done in the late 50s or early 60s and worked.then man.put different ratios in mains and a boxs so that you different have to.don't know if you could get flanges for the bigger drive shafts.

Have a idea what box they might of used?

And ya i have a 5 and a 4 but with 824 gears how fast do you think the truck will go and im not about to rip the axles out from under it thats why im looking for a box to add behind the 2 i all ready have.

And the LJ with the 5 and 3 has 902 rears and 24 inch rubber. I was keeping up with cars on the road where i live without a problem. Thas why i was wondering what kind of gears are in the White box.

Thanks Paul

[DodgeMan]

Some pics

[DodgeMan]

And the rest of the white aux trans photos.

[Brian Blaylock]

It's hard to tell in the photo but that part number kind of looks like 8031D to me just saying

[DodgeMan]

Could be, just looking for help...

Anyone know any specs on a 6041 Spicer?

[DodgeMan]

Are you sure it's not 8031C. That would be a Spicier number. There was a time when White put their name on anything they sold. Like "White" Freightliner and "White" Western Star.

Guess im going to try and find one of these transmissions. 8031C

[Mike]

Guess im going to try and find one of these transmissions. 8031C

I believe it is a Spicer 8031G

LKQ Acme Truck Parts has them on their web-site. HeavyTruckParts.Net has it. Also Specialty Truck Parts Inc. Phone 800-662-9855 has them.

mike

[mackmixer]

Quote "And ya i have a 5 and a 4 but with 824 gears how fast do you think the truck will go and im not about to rip the axles out from under it thats why im looking for a box to add behind the 2 i all ready have."

Here are the calculations I used for my Mack with 8.24 rear end ratios. You can vary the OD reduction, engine rpm, overdrive ratio (or in your case your 3rd transmission OD ratio) and tire loaded wheel radius to recalculate.

With 10.00 x 20 or 10R20 tires, the loaded wheel radius is approximately 19.2 inches.

The rear axle ratio is 8.24.

S (in mph) = engine rpm x loaded wheel radius / 168 x final gear ratio

For direct drive S = 2800 x 19.2 /168 x 8.24 = 38.8mph

For overdrive of .85 S = 2800 x 19.2 /168 x 8.24 x .85 = 45.7mph

For overdrive of .66 S = 2800 x 19.2 /168 x 8.24 x .66 = 58.8mph

Another way to calculate using revolutions per mile for tire size. If you have a diesel then your engine rpm would be lower say 2100 rpm max:

10.00 x 20 tires rotate at approximately 500 rev/mile 5280 ft/mi / 500 rev/mi = 10.56 ft/rev of a tire

At 2800rev/min for engine rpm / 8.24 rear axle ratio = 339.8rpm for direct drive x 10.56 ft/rev x 60 min/hr /5280 ft/mile = 40.8mph

Assuming single overdrive reduction of .85 then 40.8/ .85 = 48 mph

With double overdrive reduction of .66 then 40.8 / .66 = 61.8mph

10 x 22.5 rotate at approximately 517 rev/mile 5280/517 = 10.21 ft/rev

At 2800/8.24 = 339.8 x 10.21 x 60 /5280 = 39.4 mph

With single overdrive reduction of .85 then 39.4 / .85 = 46.4 mph

With double overdrive reduction then 39.4 / .66 = 59.7 mph