I have a 95'dully with a E40D transmission, 4.10 rearend. Is it ok to tow a heavy load in overdrive. I don't know if the truck has a towing package. I don't see any external transmission cooler. I bought it at 92k mi. The previous owner said he towed in overdrive. At about 115k mi I had to get the transmission rebuilt. I don't want to go through another transmission.
1995 350 PSD Crew Cab Dully 2WD Tymar 4" exhaust and Tymar air filter.
your not supposed to tow really heavy loads in od because if it downshifts from od to d it gets hard on the tranny and can cause it to over heat but ive always towed in od once im out on the flats or once i get goin a good clip down the road but if im comin up on a big hill ill drop it down to od to prevent it from shifting on me.
__________________ my photos
95 f-250 444e e4od 4X4 ex cab long bed 3.55ls White Knight Reverse Lights, AIC, FORD seatcovers, AFE STAGE2 INTAKE, 3" downpipe 4" exhuast, EDGE Evolution 100hp setting, auto meter ultra lite pyro, tranny and boost gauges, .177bb in FPR, amsoil atf in transmission & tcase, amsoil syn gear lube in rear diff, bilstien shocks, fog lights, 1000cca batteries
intercooler, smaller turbo housing, window tinting
03 vw jetta tdi stock for now
As you mentioned you will definetely want the stacked plate external cooler to keep the tranny temps in check. Also a tranny temp gauge is a must to keep an eye on the E4OD. I tow in overdrive all the time as mentioned before if it strarts hunting put it back into drive until terrain allows O.D. again. Hope this helps!
98 12V QC, 282,000 +, 5 Speed, with a few power enhancements
2000 F-350 XLT CC SRW CC PSD, 249,000+Miles, 6 Speed trans with Luk Con-O-FE clutch, 4" ATS Straight piped, Tymar style intake, Ready to start modding.
Meridian Motorsports Dyno Jet 5/13/2006
219 HP 457 TQ
Lifted 95 F-350 XLT Crew Cab Srw Lwb Psd, 268,000 + miles, 35*12.50*16.5 Trail Cutter Radial RT,4.10's, BABY SWAMPS, Humped HPOP, Homeade Tymar setup with custom 4" intake, Gutted EBPV, Modified turbo pedistal, 1.0 turbine housing, CTI AIC, Auto Meter Lunar gauges, BDP 5 position chip, Complete Alpine sound system, Automatic, Billet torque converter, Tru Cool 28,000 lb external trans cooler, Bully Dog down pipe, 5" twin turnout stacks, 6.0 intercooler with custom built pipes, Optima red top batteries, Wanting more mods!!! My webshots homepage
Bully Dog Dog Days Of Summer Dyno Pull 7/9/2005
347 hp 660 torque
I agree with Bigred on this one! Get yourself a good sized tranny cooler (most come with a small one) to keep the fluid as cool as possible.
I've had a transmission temperature fluid gauge for some time now, and that way you always know just how hot it really is.
Towing my 26' travel trailer up some of the steepest hills around, I've never seen my gauge over 195° F, and you certainly don't want to "boil" your fluid!
I always tow in OD, but in saying that, I've gotten to know my truck real well, since I've owned it for nearly 10 years now, and I know when to take it out of OD, by the RPM the engine is at. With my larger injectors, I can tow up most hills, even at a 6% - 8% grade in OD, but I DO watch my Pyrometer along with my RPM's, and lock out OD if my speed starts to slow down.
So, with a set of gauges, it makes the job of locking out OD much easier, along with listening to the engine...as you'll hear when it starts to "labor" which is when its time to take it out of OD.
2009 F450 4X4 Superduty King Ranch
6.4 Diesel, 4.30's.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.