Waiting period for synthetic ATF?

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I understand it is recommended not to use syntethic motor oil for at least 10K miles... what about the transmission fluid? Do you need to wait also?



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'01 2500 SLT+, QC, LWB, 4X4, 3. 54s, AT, every option but running lights! To come: 19. 5"s (?), lift, Line-X, Exhaust brake, 4" turbo to tail, etc...

'98 DUCATI ST2 "Bombed" 944CC with Ducati Performance Carbon Fiber Exhaust, F. I. M. Chip, K&N and "modified" air box.

 

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for the non-engine moving parts,(transmission,transfer case,axles, any exotic drives that the more creative BOMBers have attached)---last i heard the only real waiting period is how quick you can get the dinosaurs out and the lab stuff in... . happy clattering--rich

 

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What is the reasoning behind waiting before going with synthetic in the engine?

 

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Scooby--I'd let everything "seat", "wear-in" etc, before switching to synthetics. Engine should have at least 20K miles, and I don't see a problem with the transmission going to that mileage as well. 20K miles is "minimum" miles, so all the moving parts inside the engine, trans, axle assys etc, "wear in" and "mate" to one another. Another term is "break in period". You could opt for higher mileage than 20K. Ron

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2001 QC Dually SLT+ 354 LSD AUTO 4WD Driftwood SS Railcaps Stainless Werks step-rail nerfs Rhino spray-in liner Aux B/U lites Diamond Plate Alum Highways tow box SS Fender lips Jardine 4" Mag-Hytec diff & transmission Alcoa classics Reese 20K hitch 28ft Holiday Rambler 5er w/slide 84 Scrambler 4" lift 33/12. 50's 4. 56 gears soft locker/trac-lok Built 258 w/Mopar fuel injection conversion BUILDING 66-442 Olds, ground up--OH BABY! NRA 25 YEAR MEMBER

 

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You can switch to synthetic ATF as soon as you want to. I believe I switched to the Red Line synthetic ATF at around 6k-7k mi. when adding my Mag-Hytec trans. pan.

When The PowerShop performed my transmission enhancements in April (about 32k) the owner and his lead mechanic both stated they had NEVER seen a cleaner transmission (other than new). They even asked if DC had replaced the transmission with a new one under warranty. Ya gotta love that! #ad


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'98. 5 2500 QC 4x4, (BLACK) SLT Sport, ISB, LWB, 3. 54 LSD, A/T, Glasstite Vision II canopy, Line-X spray in liner, 285/75R16 BFG A/Ts on 16x8 M/T Challengers, Warn 4X Boards, Mopar fender flares, front and rear NW Custom stainless steel/rubber mud flaps, Mag-Hytec diff. cover and trans. pan, Edelbrock IAS shocks, Mopar tow hooks, Reese Titan V hitch, Jordan Research Ultima 2020 trailer brake controller, VDO Vision gauges, '00 Sport grille, '00 Sport headlights with PIAA Super White 9007/9004 bulbs, 4-2-7+4 Brite-Box, PIAA Dual Sport 900 auxiliary lights, BD exhaust brake and TorqLoc, Prime-Loc fuel filter relocation kit, Bosch 275 hp. injectors, VA CPC, DD Boost Module, Banks Stinger wastegate actuator, BLACK '00 valve cover, Banks Stinger 4" dia. stainless steel exhaust system, BD LV V10/Cummins hybrid TC and valve body, BD modified transmission front pump and PressureLoc, Air Bulldog induction hood (with NACA ducts), plus many other trick modifications

 

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Thanks for the replies.

By the way, the service manual has a few auto trannies in there, but doesn't explain which transmission is used for which application (why in the heck it doesn't - I have no idea). Do us AUTO guys have the 42RE or the 46/47RE and what is the difference?