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Old 10-23-2014, 11:30 AM   #1
Niccer
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Default Automatic transmission halp

I have what seems to be a vacuum problem going on with my brocoma and wanted some opinions on what I should start checking.

It's a 2001 Tacoma with an auto trans. The problem is mainly when I shift from reverse to drive or from park to drive, the transmission doesn't seem to engage. I'll start pressing the accelerator and the revs go up with a very slight slipping of the torque converter until it finally 'clicks' into gear. It's been happening randomly for the past week and last night happened at a stoplight for the first time, without me shifting from P to D or R to D.

I think it's a vacuum issue because around the same time I started noticing this, my brakes became very touchy at low speeds. If I'm in a parking lot or slowly coming to a stop, just the slightest touch of the brake pedal will cause the car to come to a sudden halt. Almost like the booster is getting too much of an assist.

I did some googling and it seems to be a very common problem for these trucks, but there wasn't a clear answer. Just everyone saying that it wasn't the transmission at fault after having theirs replaced. I'm thinking there might be a solenoid valve that controls the vacuum running to the brake booster and transmission causing the problem. Any ideas?
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Old 10-23-2014, 11:32 AM   #2
markman
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Leaf spring broke

punctured transmission, brake lines & gas tank
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Old 10-23-2014, 11:38 AM   #3
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Replace the Dyson with a Hoover.
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Old 10-23-2014, 11:40 AM   #4
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Niccer please
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Old 10-23-2014, 12:11 PM   #5
WRX300
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the trans shouldnt be vacuum actuated? what does the trans fluid look/smell like?

thread with manuals for the transmission

http://www.tacomaworld.com/forum/tec...-write-up.html
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Old 10-23-2014, 01:22 PM   #6
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D is for Drag
R is for Race
P is for Parachute
N is for Nitrous

This is really all you need to know about automatic transmissions.
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Old 10-23-2014, 01:22 PM   #7
Niccer
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I'll have to get back to you on the fluid. It's shifting into gear just fine, but just seems to be slipping really badly upon initial acceleration. Is there any sort of signal being sent to the torque converter or is it completely mechanical? I'll take a look through that manual later to see if anything jumps out at me.
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Old 10-23-2014, 01:29 PM   #8
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I thought that those vehicles never ever never broke down for millions of miles.
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Old 10-23-2014, 01:29 PM   #9
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Did you check the linkage? I had a similar problem with mine, you might just need to tighten it up. Just look under it where the shifter is. It's pretty hard to miss.
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Old 10-23-2014, 01:45 PM   #10
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I'll check that, but really don't think it's the linkage since I can feel the transmission clunk into all of its gears just fine. It's just really frustrating since I was going to be selling the truck in the next month and was hoping nothing would crop up before then.
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Old 10-23-2014, 01:47 PM   #11
MidnightSti05
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you bought an automatic Tacoma?

I just can't anymore...I just...CAN'T!
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Old 10-23-2014, 01:55 PM   #12
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The extended cab 4x4's only came in auto.
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Old 10-23-2014, 02:06 PM   #13
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Quote:
Originally Posted by Niccer View Post
The extended cab 4x4's only came in auto.
Same as the one I had. But never a trans issue. The converter might be electronically controlled.
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Old 10-23-2014, 02:23 PM   #14
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Oh, and for a real answer: Typical reason for slipping in an auto is low fluid pressure. Usually from low fluid or a dirty filter. I would start there as it is the easiest and cheapest solution. Drain the tranny, replace the filter, fill it up with new fluid.
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Old 10-23-2014, 02:29 PM   #15
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Will do. I haven't done the trans fluid on it yet, so that could very well be the culprit.
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Old 10-23-2014, 02:32 PM   #16
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As aod mentioned, low line pressure not engaging the clutch pack. When you rev it up it the line pressure will rise and it might clunk into gear. Possibly a bad line pressure regulator?

Edit: yes, changing the ATF is the first step. If the trans has a spin-on filter, you might want to consider changing that too. On the Subarus that had external ATF filters, it was considered a non-maintenance item, but I always changed it with the ATF anyway.
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Old 10-23-2014, 07:41 PM   #17
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Quote:
Originally Posted by aod View Post
Oh, and for a real answer: Typical reason for slipping in an auto is low fluid pressure. Usually from low fluid or a dirty filter. I would start there as it is the easiest and cheapest solution. Drain the tranny, replace the filter, fill it up with new fluid.
This for the tranny problem, your braking problem sounds like a shot diaphragm in your brake booster. You need a new brake booster to be clear.
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Old 10-23-2014, 08:04 PM   #18
racer98
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Quote:
Originally Posted by Niccer View Post
I have what seems to be a vacuum problem going on with my brocoma and wanted some opinions on what I should start checking.

It's a 2001 Tacoma with an auto trans. The problem is mainly when I shift from reverse to drive or from park to drive, the transmission doesn't seem to engage. I'll start pressing the accelerator and the revs go up with a very slight slipping of the torque converter until it finally 'clicks' into gear. It's been happening randomly for the past week and last night happened at a stoplight for the first time, without me shifting from P to D or R to D.

I think it's a vacuum issue because around the same time I started noticing this, my brakes became very touchy at low speeds. If I'm in a parking lot or slowly coming to a stop, just the slightest touch of the brake pedal will cause the car to come to a sudden halt. Almost like the booster is getting too much of an assist.

I did some googling and it seems to be a very common problem for these trucks, but there wasn't a clear answer. Just everyone saying that it wasn't the transmission at fault after having theirs replaced. I'm thinking there might be a solenoid valve that controls the vacuum running to the brake booster and transmission causing the problem. Any ideas?


I'd say take a road trip with it now and see how far you get.

no mention of miles on the truck ?
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Old 10-23-2014, 08:04 PM   #19
Matt K
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the whole part where you say "it clunks into gear fine, but then when i accelerate the revs go up but nothing happens" doesn't make any sense. Also, what the **** is "a slight dipping of the torque converter"?
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Old 10-23-2014, 08:08 PM   #20
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I'm having a crap load of transmission and electrical issues with my Freelander.

Car just dies randomly if I decelerate. Probably gonna get me killed.
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Old 10-23-2014, 08:12 PM   #21
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Quote:
Originally Posted by HalfBaked View Post
I'm having a crap load of transmission and electrical issues with my Freelander.

Car just dies randomly if I decelerate. Probably gonna get me killed.


OMG that was the worst thing that was allowed to be imported into the USA. I'm surprised there hasn't been a class action lawsuit on that Land Rover yet.

Engine in those things have a way of walking away from the car it self.
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Old 10-23-2014, 08:23 PM   #22
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Quote:
Originally Posted by racer98 View Post
OMG that was the worst thing that was allowed to be imported into the USA. I'm surprised there hasn't been a class action lawsuit on that Land Rover yet.

Engine in those things have a way of walking away from the car it self.
Its absolutely awful.

Anytime I turn on the A/C I see smoke coming out of the hood and I can smell exhaust. The check engine light is constantly on because the wiring harness is fubard, so I can't pass inspection. The electronic brakes went out but come back randomly so I'll all of a sudden just brake super hard on accident. Sometimes when I start the car it won't accelerate. Then the check engine light flashes and the car dies. I pulled out of work the other day into traffic and it did this. Nearly got wrecked.

Need to just cut ties but I'm not trying to take on a car payment right now as I'm trying to qualify for a home.
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Old 10-23-2014, 09:21 PM   #23
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I have a contender: 2006 Jeep Liberty CRD. Not enough characters in this tweet to suffice.
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Old 10-23-2014, 09:46 PM   #24
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Quote:
Originally Posted by HalfBaked View Post
Its absolutely awful.

Anytime I turn on the A/C I see smoke coming out of the hood and I can smell exhaust. The check engine light is constantly on because the wiring harness is fubard, so I can't pass inspection. The electronic brakes went out but come back randomly so I'll all of a sudden just brake super hard on accident. Sometimes when I start the car it won't accelerate. Then the check engine light flashes and the car dies. I pulled out of work the other day into traffic and it did this. Nearly got wrecked.

Need to just cut ties but I'm not trying to take on a car payment right now as I'm trying to qualify for a home.

Really sucks to be in that sort of a spot. I will suggest this as a long shot, go into a local enterprise rental car place and tell them you need a month to month rental and just get some sort of a crap box they have and get some deal worked out on a month to month rate. this way you're not buying a pile of crap to drive and dumping money into it. good luck.
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Old 10-23-2014, 09:46 PM   #25
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Dude dump the freelander, hell I've even heard of Landrover buying em back at above market value. Do not fix it.
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