Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1
  • 2

TOPIC: Aux joey box wanted

Aux joey box wanted 20 Oct 2019 16:12 #203659

  • Lang
  • Lang's Avatar Topic Author
  • Offline
  • Posts: 3565
  • Thank you received: 1453
I need a stand-alone auxilliary overdrive gearbox to go on a 1941 Army Chevrolet 1 1/2 ton 4x4. Standard Chev 235 motor and 4 speed gearbox with separate transfer case.

I used a small auxilliary box off a Butterbox ACCO on my old KBS5 International and it works great. Now the new toy needs gearing up.

Any clues? Giant Mack joey boxes are not the go.

Attachments:

Please Log in to join the conversation.

Aux joey box wanted 21 Oct 2019 02:17 #203678

  • grandad
  • grandad's Avatar
  • Offline
  • Posts: 843
  • Thank you received: 459
Would something like this be any use?
chevy.oldcarmanualproject.com/trans/55stsra/index.html
The following user(s) said Thank You: Lang

Please Log in to join the conversation.

Aux joey box wanted 21 Oct 2019 08:37 #203684

  • Lang
  • Lang's Avatar Topic Author
  • Offline
  • Posts: 3565
  • Thank you received: 1453
Grandad

That would be a good way to go. Only problem is the two speed axles give you a lower gear. What I need is a higher gear. I have a good two speed spare axle that would probably fit the Chev for my International KBS-5 but the high range is 6.33:1 which is considerably lower than the standard Chev diff. Maybe Chev produced a "highway" gear in the two speed, I will investigate further.

Thanks

Lang

Please Log in to join the conversation.

Aux joey box wanted 21 Oct 2019 11:10 #203685

  • Mrsmackpaul
  • Mrsmackpaul's Avatar
  • Offline
  • Posts: 3754
  • Thank you received: 407
Warn overdrives used to be made for all the old Landcruiser gearboxes before 5 speeds were around
Old Toyota's were a copy of US chev motors except the had metric bolts
Maybe gearboxes were copied as well

Paul
Your better to die trying than live on your knees begging
The following user(s) said Thank You: Lang

Please Log in to join the conversation.

Aux joey box wanted 21 Oct 2019 21:50 #203700

  • cobbadog
  • cobbadog's Avatar
  • Offline
  • Posts: 848
  • Thank you received: 397
Not too sure if it would too light but a Fairy Over drive from a Landrover may be worth looking at as well.
Cheers Cobba & Cobbarette
Coopernook, The Centre of our Universe.

Please Log in to join the conversation.

Aux joey box wanted 22 Oct 2019 08:08 #203709

  • Lang
  • Lang's Avatar Topic Author
  • Offline
  • Posts: 3565
  • Thank you received: 1453
All those Fairey and Warn boxes go on the back of a married transfer case (transfer bolted directly to the gearbox)

The Chev has the standard Chevrolet engine and gearbox like the normal 2WD truck then a jack shaft to the Transfer case under a cross-member well back. I will have to check but do not believe this transfer case can be added to with an overdrive unit. Therefore I need something to go between the standard box and the transfer case.

The best alternative of course is to stick a modern Borg Warner T5 overdrive 5 speed gearbox on and leave the rest of the drive train standard. I did this earlier this year with my Chevrolet 3/4 ton panel van I restored in USA then took to Normandy and it was outstanding. Only problem is although the T5 was on everything (Holden, Falcon, Jeep, Jaguar etc etc) you need one with a forward gear stick position off a Chevrolet S10 pick-up and not too many in Australia. Without that forward position the stick will come out under the seat in the truck cab.

Lang

Please Log in to join the conversation.

Last edit: by Lang.

Aux joey box wanted 25 Feb 2020 09:37 #206961

  • Lang
  • Lang's Avatar Topic Author
  • Offline
  • Posts: 3565
  • Thank you received: 1453
If you wait long enough everything comes good.

Vitamin C has delivered the correct auxiliary box to Corowa for me to pick up in a couple of weeks at the Military Vehicle Show.

Thanks John

Lang

Please Log in to join the conversation.

Aux joey box wanted 25 Feb 2020 10:18 #206962

  • Dave_64
  • Dave_64's Avatar
  • Offline
  • Posts: 2225
  • Thank you received: 146
I had a look at that 2 speed Chevy diff, interesting application for a small (2 ton) truck, firstly,
What is a "task force" truck? Just a fancy name for a run of the mill vehicle?
I went through the specs/repairs shown, couldn't find any ratios for High/Low, may have missed them, but went back and couldn't find them. What size wheels/rims/tyres would they have been running??

Please Log in to join the conversation.

Aux joey box wanted 25 Feb 2020 13:24 #206969

  • Lang
  • Lang's Avatar Topic Author
  • Offline
  • Posts: 3565
  • Thank you received: 1453
I also could only find a .73 reduction which is a handy overdrive but without knowing what the initial ratio is it is of no use.

Lang

Please Log in to join the conversation.

Aux joey box wanted 25 Feb 2020 22:54 #206993

  • Blackduck59
  • Blackduck59's Avatar
  • Offline
  • Posts: 856
  • Thank you received: 219
.73 is better than the .8 in the RR, may still look at fitting the Dodge joey I have (7231-D) which is .86 over and 2.14 under.
Certainly don't need the under but could do with some more reduction of revs at highway speed.
Which box did you end up with?
Cheers Steve

Please Log in to join the conversation.

  • Page:
  • 1
  • 2
Time to create page: 0.388 seconds

Historic Commercial Vehicles Club of Australia Inc.  Post: P.O. Box 2020 Bayswater Vic. 3153    Clubrooms: Unit 8 / 4  Macquarie Place Boronia    Club Phone: 0400 025 525    Club Rooms:  03) 9738 1558