I have a 2004 king ranch crew cab short bed and wondering if anyone else is having this problem?? When the truck shifts from 2nd to 3rd it sounds like it is in the rear but i cant tell.. When i was under the truck tonite greasing the drive shaft i can turn the shaft like a 1/4 turn and it makes a banging noise in the rear the same noise it makes when it up shifts.. Anyone having the samr problems. Iwas thinking about changing the gears but i dont know now.

 

Back lash is normal in any rear end (gear set), however 1/4 turn.......WOW...are you sure it is that much?

 

If you can turn it a quarter turn without the wheels moving then you have a VERY serious problem. Mine moves about 1/4" (the driveshaft in reference to the rearend housing) and IMHO I think that's way too much clearance between the pinion and the ring gear.

 

Maybe not a 1/4 turn but i think it is alot. what do u mean by backlash?? and does it do it all the time??

 

Backlash is the clearance between the ring gear and pinion that is required for thermal expansion--if there was no clearance they would chew each other up rapidly. It's the back and forth motion you get when you turn the driveshaft and the wheels don't move (or you feel it hit the gear inside as there's quite a bit of "slack" through the differential) I don't know how much actual knowledge about what the ring and pinion looks like that you actually have so I tried to keep it really simple. I'm sure BigHoss could explain it much much better than me.

 

A small amount of backlash is also desirable to provide for lubricant space

 

Thanks tim it was starting to bother me because that is the only thing i hear when i drive my truck.

 

You do need to determine how much back-lash you do have....if it is near a 1/4 it needs to go to the Doctor

 

My truck has a 2-3 upshift bang/pop.. My symtoms are as follows, and are trans related.. It is 'most' prominent when cold, or as the trans is 'just' heating up.. And occurs on a 'moderate' accelleration at/on the 2-3 shift point.. But is gone when fully warm, but may re occur after a short sit even warm.. Sometimes its pretty loud.. My seems to have a bit more of a shift 'flare' between the 2-3 shift than any of the other gear changes, which seems to make the condition worse.. Mine also has the 'pop/bang' when starting out at 2-3MPH that Ford has 'said' is a normal condition with no repair attempts to be made.. Very similar noise..

If yours has a massive amount of back lash, it should be fairly easy to duplicate it (bang) in the other gears as well, or, after letting off on the power and then re applying it while driving without a shift.. And, between the reverse to drive engagment you should have a bang if clearances were severe...

If you have any doubt, run it in and have Ford check the tolerance/clearance, and ID the source.. Trans. or Diff.

......................HP.........................

 

Very good point...

 

I've got exactly the same problem and have been told the same by Ford. I feel like I'm caught in a massive numbers games where Ford is caculating the long term cost of repairing or replacing problem transmissions over the warranty period versus the cost to just do the job right now. Isn't there some way we can get after Ford to take care of business NOW? If the problem was normal every tranny would do the same thing. I want one of those abnormal trannies that don't clunk!

 

Couldn't of said it better...

We should all have a box that don't bang, clunk or ?.. I've driven alot of 04's and about 5 or 6 05's now, and their 'absolutely' quiet (even ice cold) with better tighter/quicker shifts than mine.. Although mines not real bad, and is very acceptable as far as the shifts, but not the bang! Hate to buy an 05 and have it develop this 'normal' condition..

And again with the back lash issue.. Remember.. When your checking back lash for the ring and pinion, if your slambing the driveshaft back and forth your not only pulling the clearance out of the ring and pinion, but are/can be turning the carrier and pulling the added clearances out of the side gears/spyder gears as well as any clearance in the axle splines.. Plus, if your truck is being checked in 'park', you 'shouldn't' be able to get a full 1/4 turn outta the shaft because of the parking pawl to park gear lock.. If being checked in neutral, then you can be picking up and hearing some of the forward clutch separator plates to clutch drum clearance 'rattle' being transfered down the driveline along with the diff. noise when rocking it back and forth.. Not to mention the transfer case allowances..

A good way to check for excessive 'driving' clearance or noise, is to put the truck in 'tow/haul' and cruise at about 20MPH or so and just 'roll' on and off the throttle slightly, but enough to feel the drag of the engine and then again some slight pull.. If it is excess rear end bagage, it should be heard then..

...........................HP...................

 

04 F350 CRWCB FX4 build date 10/03

I had to take my truck in for a lack of power and oil leaking from the glow plugs. When I droped it off I said the trany would clunk shifting from 2nd to 3rd under moderate acceleration around 2200 and 2500 rpm. They found my glow plug harness leaking on 6 out of 8, my rear main seal leaking, and my turbo down pipe cracked. The mechanic test drove my truck and wrote down could not reproduce the problem. They pulled my trany to replace the rear main seal and never looked at it. After 3 day’s (waiting for glow plug harness) I went to pick up my truck and saw that they could not reproduce the problem. I requested to talk to the mechanic and asked if he would go on a test drive with me. I reproduced it 5 times for him. He then drove the truck and reproduced the problem. It kind of sound like when you put it in 4x4 when the front hubs lock in. He agreed that it was in the trany and said it was a shame that he just had the trany out of the truck. I have 30,000 miles on the truck now and it is getting worse. I had around 20,000 when I took it to get worked on. I’m planning on taking it back in for the same mechanic to work on it. It is very prominent when cold only from 2<SUP>nd</SUP> to 3<SUP>rd</SUP> and around 2200-2300 RPM. I will post when I get it back. I just can’t understand why I can’t have a loner that is like my truck minus the clunk when they have it for more than a day. I guess I will have to test the new F150. I love my truck and would not trade it for anything.

 

...WELCOME to the site, please read the Guidelines… Check out the list of forums and make sure you read the headings and Read First: notices in each forum. Find your forum and start posting!!!!
Enjoy FTE

 

I know exactly what you mean by "normal." My truck is also "normal." But on the other side, my truck makes completely smooth shifts when I have a trailer behind me. I just think these transmissions were built to tow or haul and not having a load on them causes them to go a little crazy sometimes. I've already had a sensor in my tranny "re-programmed" by Ford, but it had to do with shifting from 3rd to 4th.