Looking for an HT 740 Transmission

[eagle19952]

Looking at the options. Will keep the board informed of decision.

The electronic B5000 would be ideal with the overdrive. But at this time just not a feasible option.

The changes recommended ie shift points and torque converter, field work or Allision shop?

Bill

best done on a dyno..imo.

[luvrbus]

I am just saying if you can find a B4 or B500 at a buy you can program one to stand alone and deal with all the electronics when you return to the US

[Bill B /bus]

I thought the electronic transmissions were exactly that controlled electronically via the ATEC. Now I am confused.

Bill

[luvrbus]

The Allison world transmissions do not need a electronic engine to work,a fully installed touch pad with a harness are nice but 4 wires will make one work with toggles switches without all the features,they can program 1 to work as a 4,5 or 6 speed behind a mechanical engine   

[Tom Y]

I have a 740 with 15k on it. It was built for my L10 at an Allison dealer. I have since changed to the 6 speed. I NW Pa also.  Tom

[Bill B /bus]

Update.

!2 Sept

Transmission arrives tomorrow from the lower 48.
Shop is excellent. They have several real mechanics. Not just plug in the computer.

Pacific Truck and Equipment
Houston, BC

Visible from the highway, Hwy 16, due to the big Peterbilt sign. There is s Detroit Diesel shop across the street.

Thanks for all the suggestions and help. Much appreciated.

Bill

[HB of CJ]

So a New World 6 speed can be set up to work behind a mechanical engine?  Curious;  will the tranny then shift normally up and down through all 6 or would the driver have to shift a lever or push a button?  Modulation is the word I want.

[TomC]

When I had the 13spd Roadranger manual removed from my truck to put in an automatic, I wanted to use the 4000 (B500) series Allison with it's two overdrives. With my gearing (3.55 and 11R-24.5) that would give me 1354 in 5th at 65mph and 1441 in 6th at 80. But, the cost was virtually twice- about $23,000 compared to $12,000 for the HT740 and figured the 1/2-1mpg difference wouldn't be worth it.. With direct I can get a 1600 cruise at 57 (most economical rpm for my 3406B mechanical engine), or a comfortable 1800 cruise at 64. Good Luck, TomC

[Bill B /bus]

Tom,

Instead of running at 65-70 MPH we are going to be at 55-60 MPH. Since I rarely drive long days the time difference is minimal.
Thanks for the info.

Bill

[Bill B /bus]

Update!

Transmission spun for the first time this afternoon with gusto. Took the bus around the block. Shifted well up and down. Big road test tomorrow.

Thanks top all,
Bill

[Beesme]

I did notice my 740 in slow traffic snaps in gear fwd and lower gear why would that be ? But at normal speeds runs awesome!

[tom120]

The 6 speed Allison 1000 in our 1947 Flxible is behind a non electronic engine. It was programmed as a 5 speed as we don't need the extra overdrive.  About 7k miles on the conversion and it doesn't miss a beat. 60 mph is about 2300 rpm now. Travelled 625 miles in 1 day this summer. Only issue is a leaky selector shaft seal. Replaced it once but still leaks. Thinking the shaft may have gotten bumped at the salvage yard or on the pallet. Tom

[TomC]

Any electronic automatic can run behind an mechanical engine. All you need is a throttle position sensor that is calibrated for your transmission and everything works just fine. Good Luck, TomC

[luvrbus]

The 4000 RV series Allison are coming way down in price now too,the B500 probably will always be costly because it is manufactured for buses

[tom120]

Wondering if the new Eaton Procision auto trans is a threat to Allison.