Real World Results of Towing in D vs. 3

[Gzes]

Many it was what they used to recommend but then found out it was wrong and changed it in future

 

[SunlitComet]

Trannys were revised in '97 and '99. My manual say do not use overdrive.

 

[Gzes]

I never had a manual in mine so I couldn't check to see what it says about this. It doesn't really matter tho because mine is an old ass 94 but did you have the switch 4x4 yet or is that in the 2000s - up only?

 

[SunlitComet]

i posted it above for you Gzes. electric shift option started in 1996 and auto 4wd started optioning in 1998.

 

[99Yuk]

Really? I always tow in D but I always have a 4x4 when towing

I used to tow the trailer empty in D, loaded in 3 before this trip too. But now I'm monitoring stuff on the truck and I was really surprised about the temp difference. I'm gonna stay on 3 for any towing from now on.

---------- Post added at 11:38 PM ---------- Previous post was at 11:34 PM ----------

tourqe app?

TYF link HERE.
Market link HERE.
Cheap Ebay Elm327 Bluetooth link HERE.

$21 gets you complete 2-way communication with your truck. Not bad..

 

[Gzes]

Aaaahh ok. I do think it has something to do with the way of shifting to 4x4 because I have a 02 blazer with the push button 4x4 and I don't like it at all and I've tried to youse it but it doesn't feel different when driving but eh I just pop the 16 footer in the back and go and it tows that ***** like no ones business I will stop using it for towing Once my 350 sets in on the hoe. I just like the manual way of pulling the lever myself

 

[gpracer1]

I see that in a 99 manual but something is wrong with that and your suggestions.

Gzes has A 94 model and that does not apply to him. Read page 2.23 of manual I posted above. Also in third gear the PCM commands lock-up when going faster the 75mph.

Also what you just said contradicts what 99yuk has posted about temperature.

Am I missing something?

I dont know, but almost all heat comes from the TC. In OD you will get more TC lock and unlock because in OD it is under more of a load than in D. Most dont notice whether their TC is locked or not, so if the amount of load is great enough to prevent the TC from locking but not enough to downshift, you end up towing NOT LOCKED UP which makes the temps go through the roof and you burn up your trans.
He may have had enough load to prevent the TC from going into lockup while in OD but not in D.

I worked at a transmission shop for 4 years if it makes any difference.

 

[99Yuk]

I dont know, but almost all heat comes from the TC. In OD you will get more TC lock and unlock because in OD it is under more of a load than in D. Most dont notice whether their TC is locked or not, so if the amount of load is great enough to prevent the TC from locking but not enough to downshift, you end up towing NOT LOCKED UP which makes the temps go through the roof and you burn up your trans.
He may have had enough load to prevent the TC from going into lockup while in OD but not in D..

That sounds like what happened.

I worked at a transmission shop for 4 years if it makes any difference.

Good enough credentials for me...

EDIT: BTW, what does 246 mean in your sig? I've got everything else figured out but that...

 

[SunlitComet]

246 should be his t-case model. Like your if you have an auto4wd nv246/rpo np8

 

[gpracer1]

246 should be his t-case model. Like your if you have an auto4wd nv246/rpo np8

I guess I should have listed it as either NVG 246 or just 246 transfer case, or NP8.