RV Trip Planning Discussions

Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Allison Transmission Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-08-2012, 04:20 PM   #1
Member
 
Damon92's Avatar
 
Join Date: Jul 2012
Location: Nashville, TN
Posts: 68
Four Speed Questions (AT 542)

I just bought 1992 Damon Challenger this month. It is a 32' DP with 5.9 190 HP Cummins and an Allison AT 542 transmission. I just bought new radiator and transmission cooler from Hayden that I am planning to install next week. While Im at it I wanted to change fluid to Transynd since I don't know the history. Is this as simple as draining/adding with new filters? The place that sold me the cooler wants $200 for 5 gallons. Does this sound right? I also want to put a temp gauge on Transmission but wondering what kind and if theres a plug already to screw bung into. (Ive heard there was) Do I just need a universal electronic Auto Meter? the one Im looking at only reads to 250. What is the safe operating temp for this trans? I will be pulling a trailer (6x16) that weighs 7,000 lbs. Since Im asking a lot from this transmission I want to be sure to keep it cool. It has 76K on it. I have found answers similar to my question but not specifically for unit.
Thank you
__________________

Damon92 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-29-2012, 10:03 AM   #2
Senior Member
 
jauguston's Avatar
 
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
The best location for the fluid temp sender is at the fluid out to cooler fitting that is on top on the right front corner of the transmission case. Using synthetic fluid the maximum SAFE temperature is 300 degrees. I had that transmission in my last coach and used a Isspro electric gauge that went to I think 320-350. I could exceed 300 degrees using the exhaust brake I installed along with a BD low stall speed torque converter if I didn't watch it.

Jim
__________________

__________________
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
jauguston is offline   Reply With Quote
Old 09-30-2012, 06:55 PM   #3
Member
 
Damon92's Avatar
 
Join Date: Jul 2012
Location: Nashville, TN
Posts: 68
Thank you for response I will adding a gauge. I don't think Im gonna have the motor turned up. Even tho its a 190hp I am pleased with how it pulls my trailer.
Thanks again for info
Damon92 is offline   Reply With Quote
Old 09-30-2012, 07:31 PM   #4
Senior Member
 
jauguston's Avatar
 
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
If you find you want a bit more power a swap to 275RV injectors will give you a nice boost. I did that and had the ECM reprogrammed to the 275 RV map. If your motor does not have a two piece exhaust manifold keep a eye on it. When you work them hard the one piece manifold tends to crack. Cummins required I install a two piece manifold before they would remap the ECM.

Jim
__________________
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
jauguston is offline   Reply With Quote
Old 09-30-2012, 08:15 PM   #5
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,924
I have the same transmission, my 5.9 is rated at 210 hp. The trannie holds 11 quarts of fluid. As I understand it, since the torque converter doesn't drain when you do a fluid change, the amount of old fluid trapped in that then mixes with the new and it isn't considered a full change over to Transynd until after the second change. A 542 doesn't have a lock up converter, so don't plan on installing an exhaust brake unless you do as jauguston did and install a BD low stall speed torque converter.

Also, because of the 542 torque limits, you can only tweak the engine to about 230 hp before it would be exceeding the limits. I've read of some people who have modified the 5.9 cummins up to 275 without damage to to the 542. (so far?) I had no problems from Ohio to Seattle and back except for some minor high engine temps. I believe it was a dirty radiator. The slobber tube from the engine blows oil back onto the radiator and blocks it. I've given it a though cleaning and exterior flush and hope to find out if it's O.K. on a trip to Maine over the next few weeks.

I added an Isspro digital exhaust gas pyro and a transmission temp digital gauge because they are one of the few that you can extend the length of the run between sensor and gauge by just splicing in 18 gauge wire. (I checked with a few gauge makers and Isspro was the only one that O.K.ed it.)
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 09-30-2012, 08:20 PM   #6
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,924
I believe the 12 v 5.9 Cummins is all mechanical, it doesn't have a programmable ECM.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 10-01-2012, 09:16 AM   #7
Senior Member
 
jauguston's Avatar
 
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
181,


When I uprated my '99 ISB 210 to 275RV specs I called Allison to see if I was going to have problems with my AT542 at 275 HP. The Tech Support guy said If I converted to synthetic fluid and monitored fluid temperature at the fluid out to cooler location and did not exceed 300 degrees I would be fine. I had no trouble.

I also added a Isspro pyrometer and boost gauge. I called Isspro and asked if the 35' of 18ga wire added would effect the accuracy. The engineer I talked to did a quick calculation and said it would make the gauge read approximately .3 degrees high-no problem.

Jim
__________________
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
jauguston is offline   Reply With Quote
Old 10-01-2012, 09:28 AM   #8
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,924
Quote:
Originally Posted by jauguston View Post
181,

His 1992 model coach will have either a first generation or possibly second generation ISB 24 valve engine. The ISB first gen motor came out in 1998.5 and was built until 2002 so he likely has a chassis built in 2001.
Does it have a Flux Capacitor so the chassis built in 2001 could go back in time 9 years and have a 1992 body put on it? ---just sayin'
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 10-01-2012, 09:34 AM   #9
Senior Member
 
jauguston's Avatar
 
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
Brain Far* (-:

I was seeing 1992 and thinking 2002. OOPS!

Jim
__________________
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
jauguston is offline   Reply With Quote
Old 10-02-2012, 04:26 PM   #10
Member
 
Damon92's Avatar
 
Join Date: Jul 2012
Location: Nashville, TN
Posts: 68
Since its a 1992 Mechanical 5.9...wouldnt the best way to add power be thru turning up the injected pump? Mine says its a Bosch. There are a couple of high performance diesel shops here in Nashville that Im sure could do it but how much would I be up against for a job like this? I can do gauges/fluids myself.
Thanks again
Brandon
Damon92 is offline   Reply With Quote
Old 10-02-2012, 05:03 PM   #11
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,924
I believe new injectors will be the best bang for the buck on a 1st generation 5.9 12 valve. Better intake and exhaust can also help, but it gets expensive. Always be aware of the limitations of the AT 542. Check here for info and parts ideas. Dodge Diesel Performance | Dodge Transmissions | Pure Diesel Power
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 10-02-2012, 06:19 PM   #12
Senior Member
 
jauguston's Avatar
 
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
I don't know exactly what they do but on a 12v 5.9 they talk about a plate on the pump that gets changed to add power.Supposedly easy and inexpensive. Find a local diesel performance shop in your area. They will have the lowdown on what you can do.

Jim
__________________
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
jauguston is offline   Reply With Quote
Old 10-02-2012, 06:30 PM   #13
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,924
A '92 is a First generation 59 12 v. I don't think it has an adjustable Torque/Cam/Fuel Plate. That is a part that can be bought for the Second generation 5.9, built from '94 to '98.5. Check the link in post 11 for parts available.
__________________

__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 09:34 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×