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#51
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Transmission Fluid Flow Rate through Radiator problem?
"Ron(Tx)" > wrote in message ... > > > wrote in message > oups.com... >> My new transmission is (still) overheating on long highway drives. >> >> Transmission shop tested the t-fluid flow rate through the radiator at >> 1 quart every 30 seconds. >> The transmission itself however will push times that amount, 3 quarts >> every 30 seconds, all by itself and also through an aux t-cooler. >> >> My radiator is only 2 years old. When I first started having >> transmission overheating I found the radiator was shot and had it >> replaced and later put in a tran cooler too. >> >> So the questions is... >> What should be the t-fluid flow rate through the radiator? >> In other words... is my radiator restricting t-fluid flow rates below >> spec? >> >> 1993 4Runner, V6 3L, Auto, 4x4, 170K >> >> Thx >> Dave-in-Denver >> > > 95 4Runner, V6 3L, Auto, 4x4. I had a trans overheating problem also. > After a heated discussion with my dealerships service manager, where I > told him that my trans was overfilled and I thought that was my problem, > he called Toyota. The fix was to check and make sure the trans was not > overfilled. It needs to be checked after idling for 15 minutes. If it's > overfilled it will cause the clutches to slip and overheat. On my last > service they had overfilled it. They changed the fluid and filled it to > the correct level and the problem went away. > Ron, He has confirmed that the fluid does not flow efficiently through the radiator. |
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#52
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Transmission Fluid Flow Rate through Radiator problem?
>
> Ron, > He has confirmed that the fluid does not flow efficiently through the > radiator. Hi Jeff, Yes... my radiator will only flow 1 quart in 30 seconds (a third of what the tranny fluid pump wants to push) and that it did not improve after spending the nigh on the flush/cleaner machine. 4Runner is still in shop... owner working on this himself on a hit/ miss basis rather than one of the his usual guys. So tomorrow he expects to tell be result of the flow test through a NEW radiator. Thx Dave-in-Denver |
#53
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Transmission Fluid Flow Rate through Radiator problem?
>
> Hi Jeff, > Yes... my radiator will only flow 1 quart in 30 seconds (a third of > what the tranny fluid pump wants to push) and that it did not improve > after spending the nigh on the flush/cleaner machine. > > 4Runner is still in shop... owner working on this himself on a hit/ > miss basis rather than one of the his usual guys. So tomorrow he > expects to tell be result of the flow test through a NEW radiator. > > Thx > Dave-in-Denver Picked up 4Runner yesterday with new Radiator (and same aux cooler). T-fluid Flow rate through the radiator was great... "over a gallon in less than 45 seconds" according to the shop owner. (Wish he had done an apples to apples time/volume test... but the flow was "so huge" compared to the bad radiator the tranny shop knew the problem was solved. AND they did not overfill it... in fact the t-fluid levels are at the mid mark on the dipstick... not the high mark. I have a 6 hr drive in the mountains tomorrow with temps in 80's... will be a good test. Thx Dave-in-Denver |
#54
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Transmission Fluid Flow Rate through Radiator problem?
> wrote in message oups.com... > > Picked up 4Runner yesterday with new Radiator (and same aux cooler). > T-fluid Flow rate through the radiator was great... "over a gallon in > less than 45 seconds" according to the shop owner. (Wish he had done > an apples to apples time/volume test... but the flow was "so huge" > compared to the bad radiator the tranny shop knew the problem was > solved. > > AND they did not overfill it... in fact the t-fluid levels are at the > mid mark on the dipstick... not the high mark. > > I have a 6 hr drive in the mountains tomorrow with temps in 80's... > will be a good test. > > Thx > Dave-in-Denver > Thx for the feedback... Ron |
#55
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Transmission Fluid Flow Rate through Radiator problem?
> Picked up 4Runner yesterday with new Radiator (and same aux cooler).
> T-fluid Flow rate through the radiator was great... "over a gallon in > less than 45 seconds" according to the shop owner. (Wish he had done > an apples to apples time/volume test... but the flow was "so huge" > compared to the bad radiator the tranny shop knew the problem was > solved. > > AND they did not overfill it... in fact the t-fluid levels are at the > mid mark on the dipstick... not the high mark. > > I have a 6 hr drive in the mountains tomorrow with temps in 80's... > will be a good test. > > Thx > Dave-in-Denver No OVERHEATING TRANNY!!! Drove 300+ miles yesterday in the Colo mountains and not one blink from the Tran Temp Light. So the radiator was in fact the the bad guy. Checked fluid level 6 times. Had everything from half an inch under the low end of the "hot range" on the dipstick to half an inch over the high end of the "hot range". - The highest level was observed one block from the highway after a hard fast mountain pull. - The lowest level later observed was later in day on the return trip home after power costing nearly an hour back down into Denver. Thanks to everyone for there comments/suggestions! Dave-in-Denver |
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