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New tune available for the KJ transmission  RSS feed
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CRD Joe
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Joined: 18/07/2009 21:11:02
Messages: 49
Location: Seattle, Washington
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Ive got a 1985 Toyota 2L 2.4 liter diesel in a 1987 Suzuki long wheelbase Samurai that will rival any diesel in the tractor department! Lol.


'05 CRD
Suncoast, Transco, Inmotion, Provent, ORM Snorkle, HID's, 2.5" Cat back no muffler, V6 Airbox, Fumoto, Cat 2 filter
retired


GDE; (i am crdmiller)

If you have the trans go shift kit, and the in line resister, is the gde tcm tune still safe? should the resister be removed (if you guys increase pump pressure somehow)

Is this safe for vehicles with larger tiers? I have 32's and my revs/mile are not near stock. Thank you
GreenDieselEngineering
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Joined: 10/07/2009 07:25:47
Messages: 348
Location: Southeast Michigan
Anonymous wrote:GDE; (i am crdmiller)

If you have the trans go shift kit, and the in line resister, is the gde tcm tune still safe? should the resister be removed (if you guys increase pump pressure somehow)

Is this safe for vehicles with larger tiers? I have 32's and my revs/mile are not near stock. Thank you



We did not touch the line pressure as this could potentially push it past design limits and lessen the trans life. The goal was to maximize lock-up and, speed up the shifts when locked and allow trailer towing flexibility. The shift kit should not cause any issues with the trans tune and the tires will not have an effect either.

In 4th and 5th gear we do allow the trans to stay locked-up down to 1200 rpm while coasting (0% accel pedal) as this reduces fuel consumption. If the pedal is pushed while coasting with the rpm between 1200-1450rpm, it will unlock immediately.
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dgeist
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Joined: 21/07/2009 10:57:32
Messages: 10
Location: Atlanta, GA
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GreenDieselEngineering wrote:
The tune also helps with towing by allowing the customer the option to tow at 55mph in 3rd, 4th, or 5th lock-up. 3rd is available by using the OD off button and the trans will pull in 4th if one accelerates to 55mph and sets the cruise or just maintains speed. 5th is possible by accelerating above 58mph and then slowing down to 55mph. It will hold 5th gear down to 52mph.


Question: I assume the lockup behavior described above is present while not towing as well. How does that compare to a factory tune (post-service recalls). The speeds sound about the same, but obviously with the lockup part...

Thanks.
Dan
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retired


I tow 3000# in the mountains and would be concerned about lowering the shift/lockup points. As you know factory lockup in 4th is 54 mph indicated (51 actual) and 4-5 shift is 64 indicated (61 actual). Immediately after both these events RPM is about 1600. Isn't there a problem with exhaust temps if you push it too hard at low RPM?
What we really need for towing is the ability to lock out 5th. How about a one second push on the O/D lockout button to lock out 5th and a momentary push continue to lockout 4th and 5th?
flman
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Joined: 28/08/2009 19:59:32
Messages: 74
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Anonymous wrote: Isn't there a problem with exhaust temps if you push it too hard at low RPM?


Good thought, I don't have a pyro, but I doubt it is going to stay in high gear pushing hard at low RPMs?
 
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