Drive-Train Play

[yycguy]

Hi, could someone tell me what is normal play is in the drive train, I am referring to the rear drive shaft play with the truck in neutral. Mine seems to have a bout 1/2inch or so of play is that normal?

My truck is an 04 3500 SRW with 20K.

Thanks

 

[yycguy]

Come on guys someone must have an idea what is normal. The reason I ask is I seem to have a bit of a driveline clunk when the trans is shifting down (48RE) from 2nd to 1st. I think it maybe my BD Pressure-loc not realeaseing line pressure, but I am wondering if maybe I have a bad pinion grear or backlast issue ?

Thanks for any assistance

 

[Georgia Cracker]

I have a general interest in this question also. I have a Suncoast triple lok torque converter and a Fairbanks racing valve body in my 48RE. Sometimes on the upshift from 1st or 2nd I get a klunk.



Similarly, on the downshift in the lower gears I get the same klunk. Sometimes it sounds like it is comming from the transmission, sometimes it sounds like slack in the driveshaft.

 

[Gypsyman]

I just went out and checked mine and it's about the same as your. The drivetrain tolerances do leave something to be desired but every 4x4 I've ever owned has had a lot of drivetrain play. Room for heat expansion and normal gear lash.



jm. 02



Richard

 

[mconstable]

Mine's pretty clunky altogether, have to really baby getting in and out of the throttle, pretty annoying...

 

[nickleinonen]

i have a good bit of backlash on the rear diff on my truck too... i really need to get around to changing the oil in both diff's and when i am in the rear i'm gonna take a good look at the mesh pattern on the gears. if it looks good to me, i won't worry about it. a little extra lash there isn't going to hurt anything.

 

[yycguy]

Thanks guys, seems that my backlash is about normal. I guess It's got to be my BD pressure-loc that's hanging up

On the topic of rear diffs. What is the thoughts of draining the rear diff fluid Millage?

I have 20K and I was thinking about changing it. pretty simple procedure isn't it?

How does one determine what rear axle we have on the 3500 SRW? the 10 1/2 or the 11 1/2 also what brand fluid do guys recommend other than the Mopar stuff.

Thanks

 

[nickleinonen]

yyc:



you should have the 11. 5 being a 3500, and from the 48re in your sig, you are HO and they all had the 11. 5

 

[yycguy]

nickleinonen, thanks.