Expy Towing rpms
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New User
Joined: May 2003
Posts: 19
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Expy Towing rpms
I drive a 99 Expy XLT,4.6L, 3:55 gear ratio.
This did not come with a towing package, I have installed a proper
hitch,7 point wiring harness, torsion bars,upgraded the tranny cooler, K@N filter, Cat back exhaust,etc., but left the stock radiator as is.
I recently purchased a 24 foot Coachmen TT that weighs in at
4300lbs loaded. Taken it on a few small trips,(500 miles total) fairly flat terrain, some hills.
I tow out of OD all the time and am for the most part satisfied with the performance although the ideal package would be a 5.4L
with the 3:73, but didn't buy the vehicle new in '99 for towing.
I usually drive at 55-60 mph,tach shows the rpm's at 23-2500.
I am concerned at the higher rpms, and the wear on the tranny.
Is this a normal rpm range, is a tranny guage something I should be looking into.
I'm planning a longer trip later in the month.
Comments, advice on towing speeds. anything else required?
Thanks.
This did not come with a towing package, I have installed a proper
hitch,7 point wiring harness, torsion bars,upgraded the tranny cooler, K@N filter, Cat back exhaust,etc., but left the stock radiator as is.
I recently purchased a 24 foot Coachmen TT that weighs in at
4300lbs loaded. Taken it on a few small trips,(500 miles total) fairly flat terrain, some hills.
I tow out of OD all the time and am for the most part satisfied with the performance although the ideal package would be a 5.4L
with the 3:73, but didn't buy the vehicle new in '99 for towing.
I usually drive at 55-60 mph,tach shows the rpm's at 23-2500.
I am concerned at the higher rpms, and the wear on the tranny.
Is this a normal rpm range, is a tranny guage something I should be looking into.
I'm planning a longer trip later in the month.
Comments, advice on towing speeds. anything else required?
Thanks.
Elder User
Joined: Nov 2002
Posts: 736
Likes: 1
From: Texas, USA
Expy Towing rpms
Higher rpm's are good for you. Don't worry until you have to drive all day at above 5K rpm. Seriously! Your engine and tranny love 4K rpms all day long. With that 3.55 rear diff, you need to keep your revs up to develop all the torque and hp you can while towing in high gear. With the upgrades you have done, there is very little chance you will ever overheat the tranny or the engine except under the most severe conditions which I define as pulling your trailer in the sand uphill in the desert in 120 degrees. You are smart to drive 55-60, because it takes a lot less out of the driver at that speed. Enjoy your rig.
Hope this helps. See you out there.
Hope this helps. See you out there.
Expy Towing rpms
Laughing Gas
Joined: Dec 2001
Posts: 858
Likes: 14
From: Virginia
Expy Towing rpms
23-2500 rpm isn't high, especially for the modular motors. My '99 5.4L has the 3.73 and runs about 2300 rpm at 70 mph when in overdrive and I have routinely run much faster then that for hours on end!
Junior User
Joined: Dec 2002
Posts: 53
Likes: 0
From: TN Foothills
Expy Towing rpms
Yep to the above replies. The rpm over 2500 is good, 3000 is better. Trans won't complain as long as you don't use OD.
I might suggest a Transgo Performance Kit which will firm the shifts and help the life. It works!
I might suggest a Transgo Performance Kit which will firm the shifts and help the life. It works!
Junior User
Joined: Dec 2002
Posts: 53
Likes: 0
From: TN Foothills
Expy Towing rpms
Originally posted by Oiler99
I haven't heard of the transgo performance kit.
What exactly is it's function?
Can I install it myself?
I haven't heard of the transgo performance kit.
What exactly is it's function?
Can I install it myself?
Save this or/and search the forum for more info. If I can help, OK. I've done mine 3 times; 1. Did the routine, wasn't firm enough 2. redrilled calibration hole larger 3. replaced tiny spring I left out.....brain fart.
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