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I have a 2006 Mega 4x2 that is less than 1 year old. When I start it in the mornings and shift into drive or reverse, it takes about 30 seconds before the truck will move. I can give it gas (diesel) and it will rev up a little and then start to move. It's almost like it is trying to build up pressure or something. If I drive it and then stop at the store, when I come back out it will go as soon as I shift it into gear. Only does it after sitting overnight. Dealer says this is normal.

I am also rolling up on 15k miles. The schedule B says tranny and rear differential change at 15k miles. Every 15k miles. Schedule A says tranny at 100k and I don't even see the rearend change. Schedule B seems a little excessive. Schedule A seems a little too lax. When is everyone changing their tranny and differential fluids?

 

Tranny every 30k, rear end anywhere from 30k - 60k. The tranny is not right. There is likely an easy fix though. Hopefully a trans guy will chime in.

 

sounds like your TC is draining. If it's taking 30 secs to fill again you may have a bad anti drain valve I think that's what it is called. some will drain back more than others. some can sit for days without draining at all. I'm no tranny guy, but I did stay at a Holiday Inn Express last night. lol. Try putting it neutral for a few secs before putting it into gear and see if that helps.

 

Very easy solution for you: when you start up in the morning, start in neutral, or shift immediately to neutral and idle for at least 30 seconds.

Problem solved

This is normal operation for the TC.


EDIT: That was stated already, so there you have it!

 

Fill in your sig and location. Are you in very cold temps?

Cold will slow down the TC fill but 30 secs is a bit long. If you were wondering, the tranny pump doesn't run in park but does in neutral.

Cya

 

The factory gear oil should IMHO be changed out no later then 5K and then if you use a good synthetic gear oil you should be Ok at 30K change intervals unless you tow heavy or are in a lot of water. My 2006 owners manual shows at 30,000 miles drop the Transmission pan and install a new filter and top up with new AFT+4 fluid. I think if you use full synthetic trans fluid you should be Ok to go 40-45K in between service unless you do a lot of stop and go city driving or tow heavy then stay at 30K service intervals.

 

On drainback: A overnite drainback that takes "30" seconds to start moving seems excessive.
There used to be a anti drain back valve in cooler rt side block. It may be missing or stuck open.
Excessive clearance in converter hub bushing or seals on input shaft could contribute.
Air/oil leaks on valve body, or pump housing could cause.
The problem in part is: As fluid in converter cools it shrinks. This causes a pulling action into converter. If it pulls air it will start dribbling oil out of converter through some path(above) and air into converter.
There are some other possibilities that are variations of above, but with the same theory.

 

It's not real cold - I live outside of Dallas. I checked it this morning and it was around 7 seconds not 30 as I stated - feels like 30.

At 5 seconds, I goosed the throttle and she moved. I will try shifting to neutral tomorrow morning and let it sit for a few seconds and then shift to reverse.

So based on the feedback, should I take it back to the dealer and have them look at it? Remember, the last time they told me "this is normal, they all do it" - same freakin' thing the Harley dealer says so they don't have to do warranty work.

Thoughts?

 

Temp difference from operating temp too ambient is enough to cause. The pause in neutral will certainlly help.

 

Quite a difference between 7 and 30 . I don't think you have much of an issue but some good advice above.

Cya