Hi;
I have autostick superbeetle 1974 (semiautomatic), this system works only with a torque converter and ATF (not 100% automatic trans)......Recently rebuilt engine, everything seems to work fine again after engine work.
For better control, install a pressure gauge in the out atf pump, but I find that the ATF (dexron III) pressure works fine just in cold, after a few minutes to run engine temps appears and the atf pressure low too much, . This suggests that the atf used should be "more viscous" so as not to dilute both with temperature. I think the new atf DEXRON III (or higher) is "less viscous" than the old atf dexron recommended in the manual.
Perhaps it would be best to use thicker ATF for the "old or rebuilt" pumps work better.
The question is whether the system will be "reliable" with a less viscous oil combined an old or just rebuilt pump, especially for long trips in summer ?
My ATF pressure numbers now with new dexron III;
Engine cold temps:
at idle 15 psi
at 2000 rpm 52 psi aprox (perfect, bentley manual)
at 3500 rpm 55 psi max.
to normal temps:
at idle 8 psi
at 2000rpm 38 psi (too low by bentley manual specs).
at 3500 50/55 psi max.(oil relief piston work)
I would try to agree STP oil treatment for increased the viscocity, maybe the numbers with high temps are better!!
Any "better viscocity" ATF type recomendation?
Regards.
I have autostick superbeetle 1974 (semiautomatic), this system works only with a torque converter and ATF (not 100% automatic trans)......Recently rebuilt engine, everything seems to work fine again after engine work.
For better control, install a pressure gauge in the out atf pump, but I find that the ATF (dexron III) pressure works fine just in cold, after a few minutes to run engine temps appears and the atf pressure low too much, . This suggests that the atf used should be "more viscous" so as not to dilute both with temperature. I think the new atf DEXRON III (or higher) is "less viscous" than the old atf dexron recommended in the manual.
Perhaps it would be best to use thicker ATF for the "old or rebuilt" pumps work better.
The question is whether the system will be "reliable" with a less viscous oil combined an old or just rebuilt pump, especially for long trips in summer ?
My ATF pressure numbers now with new dexron III;
Engine cold temps:
at idle 15 psi
at 2000 rpm 52 psi aprox (perfect, bentley manual)
at 3500 rpm 55 psi max.
to normal temps:
at idle 8 psi
at 2000rpm 38 psi (too low by bentley manual specs).
at 3500 50/55 psi max.(oil relief piston work)
I would try to agree STP oil treatment for increased the viscocity, maybe the numbers with high temps are better!!
Any "better viscocity" ATF type recomendation?
Regards.