Drivetrain Temp Questions
I posted this in another thread, but I really transitioned to a different topic:
Brief: Engine and tranny temps in the past few thousand miles have gone up as listed below. Neither is even approaching overtemp, but it's been an "item of interest". The engine used to run around 160° and the tranny 150°. Now it's 190°/180°.
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"Quasi-Epilogue: Because the transmission is operating normally, I replaced the thermostats (5-hour job because obstructions necessitated the removal of the entire housing to get at the 'stats).
New 'stats were installed, and after 370 miles, the temps are still "what I'm not used to". But testing the old (OEM) 'stats revealed one was sticky, and in testing neither 180° stat cracked until over 195°.
Coolant temp on straight-and-level runs around 190° with the new 'stats. Tranny temp is nailed around 180°. This is what I would expect in theory.
I suspect that one of the OEM 'stats was stuck open, and only recently closed normally; prior "normal" temps were coolant <160°, tranny ~150°. These are cooler than I would have expected. Apparently, the stuck-open 'stat corrected itself, and in operating normally, increased the temps.
Anyway, The tranny is due for change of fluid, which I'll do when I get home. I expect no difference in operating temps after. But at least I'll be able to collect any TC lockup residue for the Missy Good Wench Museum and Leftover Parts Emporium.
Bottom line: I think the system is now working normally after not for a long period."
Any comments would be appreciated, especially about causes for the change in operation that I've overlooked.
'94 Barth 28' Breakaway M/H ("StaRV II") diesel pusher: Spartan chassis, aluminum birdcage construction. Peninsular/AMG 6.5L TD (230HP), 18:1, Phazer, non-wastgated turbo, hi-pop injectors, 4L80E (Sun Coast TC & rebuild, M-H Pan), Dana 80 (M-H Cover), Fluidampr, EGT, trans temp, boost gage. Honda EV-4010 gaso genset, furnace, roof air, stove, microwave/convection, 2-dr. 3-way reefer. KVH R5SL Satellite. Cruises 2, sleeps 4, carries 6, and parties 8 (parties 12 - tested).
Stand-ins are an '02 Cadillac Escalade AWD 6.0L and an '06 Toyota Sienna Limited.