DodgeTalk Forum banner
Status
Not open for further replies.

Reverse Noise??

33K views 13 replies 9 participants last post by  tactransman  
#1 ·
I started my truck today and was getting ready to backup to turn around in my driveway, after i put the truck in reverse, i had to sit a sec to make a call, while i was on the phone i heard a low roar/"whir" type sound. i turned the music down and got off the phone to realize what it was. i backed up and as i did it seemed to get a lil worse... well i put it in drive and it disappeared.

Now i was slightly worried my tranny might be going, but thought it might be just the reverse not totally engaging, or i might need to change the fluid.

Got to work, went to back it up, and the noise wasnt there when i put it in gear... any chance this could just be a fluid temp issue, or i need to change the fluid??
 
Save
#2 ·
my trucks done this ever since i got it 2 years ago. First time i start it in the morning and put it in reverse it makes the low whirring sound and then when i put it in drive its not there and doesn't make that sound at all for the rest of the day. my fluid is still nice and red but clear. I've "heard" something about straight cut gears making this noise in reverse but thats what i've "heard", i'm not any kind of mechanic and i don't know what qualifies the person i heard it from to make that statement so by all means keep looking for a definite answer ;)
 
Save
#3 ·
Mine does the same this, it pissed me off the first time I heard it, I wa slike "great what now"...but after the tranny warms up it doesnt do it anymore.
 
Save
#4 ·
Mine does the same thing. I remember hearing something about pressure needing to build up but I don't know how much truth there is to that.
 
Save
#5 ·
No worries guys, that's normal. It's simply a noise issue and not a really break down type problem. There is/was a TSB for this but it requires tearing into the tranny to replace a couple of parts to stop the flapping noise (which sounds like a whirring sound on the outside). Mine did that also on cold starts till I figured out how to avoid it. Just put the tranny in Neutral for a few seconds before going into reverse. You will build up enough pressure to avoid that sound.
 
#6 ·
thanks! if its a pressure issue would a change of tranny oil/topping off oil help that? and yea first time i heard it i was scared id lose a tranny, and im getting married, can not afford that at all!! lol. so money is tight, and i cant have it get any tighter.
 
Save
#8 ·
Topping off, or having the right fluid level will not make any difference. The problem that causes the noise is a lack of pressure at cold start ups. The reason for this is that the pressure drains out of the tranny as your truck sits over night, and the 46RE does not pump in Park. So you can warm up your truck for 30 minutes in Park and the tranny will still be sitting there waiting without doing anything. Once you put it in Neutral or Reverse, then it starts to pump. So once you are ready to go, just keep your foot on the brake and slip into Neutral and count to 20 or 30 then put in Reverse and you wont hear that Buzzing , Whirring sound because you will have built up enough pressure. It only happens in Reverse, not in Drive. For people that put their trucks in Drive to leave never notice this problem.
 
#9 ·
hmm, thanks. i appreciate the relief lol
 
Save
#10 ·
Gentlemen: The noise going into reverse is because the tranny line pressure is highest when in reverse. Drive or any other range has LESS line pressure than reverse, which is effected by cold temperatures. As for the slow engagement or very sluggish drive for a few seconds is because of the converter drainback to the pan.When parked overnight or longer periods the oil WILL drain back out of the converter,Which means when you get going in the morning the converter is only half full of oil & then must be REcharged back into the converter before the truck will move! Our trannys DO NOT PUMP OIL IN PARK! So, as has been stated just put your truck in neutral for a few seconds before driving off & this WILL solve the problem. IT IS MANDITORY in very cold climates. This will ADD tranny life!! Also, the good shift kits out there rectify this problem by allowing the tranny to pump in park. A GOOD quality shift kit can EASILY DOUBLE the life of our trannys & is a must must mustTHANKS
 
#11 ·
You know, I was going to question exactly what you stated here. That makes sense possibly as to why many of our transmissions fail in no time. People let their trucks sit, idleing, thinking everything is warmed up and ready to go... then take off without a concern about the trans being completely ready for all those up/down shifts. Next thing you know, your trans is going out, and you wondering how that's possible, when you let it warm up before putting it in gear. I will definately be keeping that in mind, since I bought my truck a few months ago, with 77K and it slams into reverse pretty hard, and I always apply my parking brake before taking my foot off the brakes, to keep pressure off the trans.
 
Save
#12 ·
FYI: Most shift kits will pump fluid in park by design so the neutral starting isn't necessary if you have a good kit made by Transgo or Superior. (Not sure about B&M which supplies Mopar Performance.)
 
Save
#13 ·
There is an old thread on here about this, I couldn't find it . Do a search and see if you can find it.
 
Save
#14 ·
Save
Status
Not open for further replies.
You have insufficient privileges to reply here.