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Romer
10-05-2008, 10:50 PM
Rachel's 4runner (99 3rd gen, auto 3.4L) has an intermittent slip in the transmission. Doesn't happen all the time. I don't want the tranny to go out on her leaving her stranded.

The right fix is to either replace or rebuild the existing tranny.

I know there is Lucas stop slip out there, not sure if that really works.

On thread on Yota tech made a mention of a pressure adjustment cable thats located up near the throttle body that would increase the pressure for the clutch. Couldn't find any more info on that and I don't know if an adjustment there could help her.

The tranny fluid was changed (full fluid exchange)40K miles ago and still looks good. Didn't do the filter but don't see how that would cause a slip.

Any ideas out there?

Uncle Ben
10-05-2008, 10:57 PM
How many miles are on it? Rebuilding is very costly but you can find the A340F tranny in salvage yards a plenty! It actually is very similer to the 343 in your 80! Tough slushboxes!

Rachel's 4runner (99 3rd gen, auto 3.4L) has an intermittent slip in the transmission. Doesn't happen all the time. I don't want the tranny to go out on her leaving her stranded.

The right fix is to either replace or rebuild the existing tranny.

I know there is Lucas stop slip out there, not sure if that really works.

On thread on Yota tech made a mention of a pressure adjustment cable thats located up near the throttle body that would increase the pressure for the clutch. Couldn't find any more info on that and I don't know if an adjustment there could help her.

The tranny fluid was changed (full fluid exchange)40K miles ago and still looks good. Didn't do the filter but don't see how that would cause a slip.

Any ideas out there?

Romer
10-06-2008, 09:45 AM
How many miles are on it? Rebuilding is very costly but you can find the A340F tranny in salvage yards a plenty! It actually is very similer to the 343 in your 80! Tough slushboxes!

There is 140K total miles on it. I have a good Russian friend who likely has one as well.

I am trying to gauge if this is something that will fail and strand her, or something that will slowly get worse over time. I am also wondering if there are things (Adjustments, Lucas ant-slip) that would lengthen the life.

Uncle Ben
10-06-2008, 10:51 AM
There is 140K total miles on it. I have a good Russian friend who likely has one as well.

I am trying to gauge if this is something that will fail and strand her, or something that will slowly get worse over time. I am also wondering if there are things (Adjustments, Lucas ant-slip) that would lengthen the life.

140k is not that high of mileage. You might have a fixable issue going on!

treerootCO
10-06-2008, 11:11 AM
My transmission has the same issue. I have found that it dislikes hauling more than one person around. What you need is to add some more clutch to the bands. :)

Uncle Ben
10-06-2008, 11:23 AM
My transmission has the same issue. I have found that it dislikes hauling more than one person around. What you need is to add some more clutch to the bands. :)

Maybe just dump some liquid smoke into the tranny dipstick tube! :rolleyes: :lmao:

SteveH
10-06-2008, 03:55 PM
I might have a qualified tranny shop take some pressure measurements. I wouldn't add any 'rebuild in a can' of any brand. Given my history with tranny shops, I'd install a good used one before I'd pay a small fortune to have one fully rebuilt and then hope they did it correctly.

Juyst my .02...

Steve

Uncle Ben
10-06-2008, 04:05 PM
I might have a qualified tranny shop take some pressure measurements. I wouldn't add any 'rebuild in a can' of any brand. Given my history with tranny shops, I'd install a good used one before I'd pay a small fortune to have one fully rebuilt and then hope they did it correctly.

Juyst my .02...

Steve



Sound advice!!!!!!!!!!!!!!!!!!!!!!!!!!! :thumb::thumb:

powderpig
10-06-2008, 04:40 PM
The cable they are talking about is the Kick down cable just like on your 80. If you look at the throttle body, you should see 3 cables that go to it. One is the throttle cable, one is the cable for the cruise control and the other is for the transmission. You will need a couple of wrenches. Either 12mm or 14 mm(the 80 is 14 mm). Adjust the nut to allow the cable on the Kick down to go away from the bracket, this should show a lead marker. this should go past the rubber boot about 1-2 mm. this cable besides down shifting control, also adjust the line pressure for the tranny.
good luck with this.

Romer
10-06-2008, 04:55 PM
The cable they are talking about is the Kick down cable just like on your 80. If you look at the throttle body, you should see 3 cables that go to it. One is the throttle cable, one is the cable for the cruise control and the other is for the transmission. You will need a couple of wrenches. Either 12mm or 14 mm(the 80 is 14 mm). Adjust the nut to allow the cable on the Kick down to go away from the bracket, this should show a lead marker. this should go past the rubber boot about 1-2 mm. this cable besides down shifting control, also adjust the line pressure for the tranny.
good luck with this.


Thanks Robbie. You see any reason this would help with an intermittant clutch slip? When you say away from the bracket, in what direction, towards the firewall or towards the radiator?

nuclearlemon
10-06-2008, 05:31 PM
Thanks Robbie. You see any reason this would help with an intermittant clutch slip? When you say away from the bracket, in what direction, towards the firewall or towards the radiator?

don't know if runner's are the same as an 80, but if so, they go sideways.

Uncle Ben
10-06-2008, 07:20 PM
don't know if runner's are the same as an 80, but if so, they go sideways.

Mine doesn't! ;) :p::hill:

Romer
10-06-2008, 07:43 PM
They did go sideways and 2 of the three cables were real loose. The Haynes manual says the cable for the tranny should be taught. I tightened it up and Rachel will drive it a bit and so how it responds. My quick drive showed no issues, but it has been real intermittant. Supposedly from the Yota Tech thread (and Robbie's post), this cable determines the pressure for the clutch internal to the transmission. I hope that's all it was.

It was a 14MM on the 4runner.