Truetrac users, Oil Color and drivetrain slop/Backlash questions. - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Joe.G · 04-30-2023, 07:24 PM

No you can grab the wheels and rotate them a bit before Dshaft moves and vice versa, car is basically Brand new very low mileage Dshaft is tight and not worn. It appears to be normal from what I am reading and my Ram truck is the same way with the TrueTrac and that also has 3.91 in it. The Ram is a auto so you do feel it from time to time when going from R to D.

bottletalk · 04-30-2023, 08:15 PM

the trutrac does have play, it's how the helical gears/limited slip work and transfer power to the tire with traction. I don't think ur feeling anything excessive beyond that.

Joe.G · 05-01-2023, 07:21 AM

Overall how does my Gear pattern look? I have only done or been involved in a few Gear Diff's swaps and I found this rear a little more difficult then others I have done, Having a Factory spreader probably would have helped. Getting the Diff/Gears in and out was a pain. I did make a set up Pinion bearing that would slide on and off to make that part easier.

Joe.G · 05-07-2023, 07:15 AM

Anyone else notice this?

Bow94z · 05-08-2023, 03:23 PM

can't say i noticed this on mine but i also was not at the shop the entire time when they installed.

My factory setup had alot of movement

acammer · 05-09-2023, 05:13 PM

Eaton actually references this on their website somewhere, the TruTrac is expected to have more substantial lash than a standard differential. I think they said something like 4* on the output side is expected. That's quite a bit on a 28" diameter wheel. Add in all the other parts lash (clutch, transmission, 2pc driveshaft, ring and pinion, axle at each end, and you end up with a pretty substantial amount of lash.

As long as it's quiet and working right, I wouldn't be nervous. The very dark oil on the initial change is perfectly normal, that's the coating wearing off the ring and pinion as it breaks in, and is a large part of the reason you make the early 500 mile oil change on a new ring and pinion, the oil will look much better on subsequent changes.

Also keep in mind that Eaton recommends NON-synthetic fluid, and NO limited slip additive - those are both OPPOSITE of what the factory original calls for.

Joe.G · 05-09-2023, 06:10 PM

That's what I kinda figured, both my Vehicles have about the same amount of lash. I run 80/90 Torco gear oil which is non Syn.

Bow94z · 05-10-2023, 10:22 AM

did the Trutrac make shifting gears a tad bit more "clunky"?

Joe.G · 05-10-2023, 12:00 PM

Not that I noticed, would a one piece shaft make the lash more or less noticable? ( I don't notice it now really just wondering )

acammer · 05-10-2023, 12:42 PM

Quote:

Originally Posted by Joe.G

Not that I noticed, would a one piece shaft make the lash more or less noticable? ( I don't notice it now really just wondering )

In theory it will reduce it. Typically there isn't much low load lash in the factory two piece driveshaft, but it is susceptible to wind up in the couplers and carrier bearing mount when it gets loaded/unloaded. A 1pc will definitely transfer more noise, which some people equate to more lash since they can hear it better.

04-30-2023, 07:24 PM	#15
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,265	No you can grab the wheels and rotate them a bit before Dshaft moves and vice versa, car is basically Brand new very low mileage Dshaft is tight and not worn. It appears to be normal from what I am reading and my Ram truck is the same way with the TrueTrac and that also has 3.91 in it. The Ram is a auto so you do feel it from time to time when going from R to D. __________________ GM 3.91/TrueTrac OEM ZL1 Rims, Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,Remote Clutch reservoir GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, Moroso Catch Can GC Aluminum DS Stainless Works Ceramic LTH/HiFlo Cats SCT X4 Dynosteve, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.

05-01-2023, 07:21 AM	#17
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,265	Overall how does my Gear pattern look? I have only done or been involved in a few Gear Diff's swaps and I found this rear a little more difficult then others I have done, Having a Factory spreader probably would have helped. Getting the Diff/Gears in and out was a pain. I did make a set up Pinion bearing that would slide on and off to make that part easier. __________________ GM 3.91/TrueTrac OEM ZL1 Rims, Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,Remote Clutch reservoir GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, Moroso Catch Can GC Aluminum DS Stainless Works Ceramic LTH/HiFlo Cats SCT X4 Dynosteve, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.

05-07-2023, 07:15 AM	#18
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,265	Anyone else notice this? __________________ GM 3.91/TrueTrac OEM ZL1 Rims, Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,Remote Clutch reservoir GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, Moroso Catch Can GC Aluminum DS Stainless Works Ceramic LTH/HiFlo Cats SCT X4 Dynosteve, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.

05-08-2023, 03:23 PM	#19
Bow94z Drives: 2015 Camaro 2SS/RS Join Date: Jan 2007 Location: Philadelphia Posts: 78	can't say i noticed this on mine but i also was not at the shop the entire time when they installed. My factory setup had alot of movement __________________ 2015 2SS/RS 6spd Rotofab CAI,MGW Shifter, DSP Tune Kooks LT/HFC/Xpipe/NPP Mufflers 4:10's, Trutrac Solid Cradle Bushings, BMR Toe and Trailing arms

05-09-2023, 05:13 PM	#20
acammer GPI Sales Consultant Drives: 2011 Camaro 2SS SGM Join Date: Jul 2016 Location: Weedsport, NY Posts: 2,816 View My Garage	Eaton actually references this on their website somewhere, the TruTrac is expected to have more substantial lash than a standard differential. I think they said something like 4* on the output side is expected. That's quite a bit on a 28" diameter wheel. Add in all the other parts lash (clutch, transmission, 2pc driveshaft, ring and pinion, axle at each end, and you end up with a pretty substantial amount of lash. As long as it's quiet and working right, I wouldn't be nervous. The very dark oil on the initial change is perfectly normal, that's the coating wearing off the ring and pinion as it breaks in, and is a large part of the reason you make the early 500 mile oil change on a new ring and pinion, the oil will look much better on subsequent changes. Also keep in mind that Eaton recommends NON-synthetic fluid, and NO limited slip additive - those are both OPPOSITE of what the factory original calls for. __________________ GPI Max Package 2.0: Brodix BR7 heads/GPI porting, MAX3 cam, ST2116LSR, BSR Max Lift rockers, LS7 LSXR with 103mm TB, Vararam OTR, Mcleod RXT, G-Force/Strange 9" IRS setup with 4.63 gear. 551whp, 11.1@124mph. *Got a question about a GPI product? Feel free to shoot me a message!*

04-30-2023, 08:15 PM	#16
bottletalk Drives: 15 Camaro 2SS M6 Join Date: Jan 2020 Location: BC Posts: 732	the trutrac does have play, it's how the helical gears/limited slip work and transfer power to the tire with traction. I don't think ur feeling anything excessive beyond that.

05-09-2023, 06:10 PM	#21
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,265	That's what I kinda figured, both my Vehicles have about the same amount of lash. I run 80/90 Torco gear oil which is non Syn. __________________ GM 3.91/TrueTrac OEM ZL1 Rims, Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,Remote Clutch reservoir GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, Moroso Catch Can GC Aluminum DS Stainless Works Ceramic LTH/HiFlo Cats SCT X4 Dynosteve, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.

05-10-2023, 10:22 AM	#22
Bow94z Drives: 2015 Camaro 2SS/RS Join Date: Jan 2007 Location: Philadelphia Posts: 78	did the Trutrac make shifting gears a tad bit more "clunky"? __________________ 2015 2SS/RS 6spd Rotofab CAI,MGW Shifter, DSP Tune Kooks LT/HFC/Xpipe/NPP Mufflers 4:10's, Trutrac Solid Cradle Bushings, BMR Toe and Trailing arms

05-10-2023, 12:00 PM	#23
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,265	Not that I noticed, would a one piece shaft make the lash more or less noticable? ( I don't notice it now really just wondering ) __________________ GM 3.91/TrueTrac OEM ZL1 Rims, Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,Remote Clutch reservoir GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, Moroso Catch Can GC Aluminum DS Stainless Works Ceramic LTH/HiFlo Cats SCT X4 Dynosteve, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.