H150F 5 speed transmission question (1 Viewer)

[WarDamnEagle]

Apologies for my laziness but here is a cut and paste from my build thread to introduce the topic:

I might need to start a separate thread but I will start here. My FZJ75 has an H150F transmission (5 speed). It has performed flawlessly since I bought the pickup except it doesn't always want to downshift from 3rd to 2nd. I changed the trans fluid to Redline Synthetic MT90 and that didn't make the issue any better so I just assumed I would need to have the synchros addressed at some point in the future.

Fast forward to today and since getting the pickup at the port it doesn't want to shift into reverse. Most of the time you need a bit of a rolling start (preferably backwards) to get it to go but when you hit that sweet spot it drops right in. It doesn't grind or make any noise; it just won't go into reverse. It's almost like you are trying to put the shift lever into an area that doesn't have a gear. I checked the trans and transfer case oil levels yesterday and they were a little low (have a tiny seal leak that I need to address) so I topped the levels off. That has not helped the issue. Again, there was zero issue when I dropped the truck off for shipment.

I am a total transmission neophyte so I thought I would see if anyone has any ideas short of pulling the transmission and shipping it off to someone. Thanks.

So, I guess my question is, who should I contact to rebuild this transmission, assuming a rebuild is necessary? Happy to hear an easier solution if there is one out there but I'm guessing every solution will entail at minimum dropping and opening up the transmission. My son just drove the pickup around 4 hours each way to our condo and there is zero change in the behavior so I doubt this problem is going to magically go away with continued use.

 

[fl4031003]

I have a h150f sitting in my 79 pickup, truck is not running at the moment but your welcome to come shift through the gears to get a feel for how it should feel, the transmission has 51k miles on it

 

[WarDamnEagle]

I have a h150f sitting in my 79 pickup, truck is not running at the moment but your welcome to come shift through the gears to get a feel for how it should feel, the transmission has 51k miles on it

Appreciate the offer. I'm pretty sure I know how it's suppose to feel. It went into Reverse smooth as butter until it didn't.

 

[orangefj45]

Have you removed the shifter to check the shifter and seat? Does the shifter feel loose in its top cover socket?
How many miles are on this unit?

Georg @ Valley Hybrids @ Cruiser Brothers
Shop 209-475-8808
Sales@valleyhybrids.com

 

[WarDamnEagle]

Have you removed the shifter to check the shifter and seat? Does the shifter feel loose in its top cover socket?
How many miles are on this unit?

Georg @ Valley Hybrids @ Cruiser Brothers
Shop 209-475-8808
Sales@valleyhybrids.com

Appreciate the suggestion Georg. Someone else just asked me the same question. 270k km so about 168k miles. Let me go check looseness around the bottom of the shifter.

 

[WarDamnEagle]

Georg, @orangefj45 the shifter doesn't wiggle up and down or seem to have any play horizontally at the bottom. I can still pull the shifter and take a look at the bushing but haven't yet.

So I have it parked on a slight uphill incline so that it will roll back on it's own. If you let it roll back while trying to put it into reverse it will slip right in after it rolls for a foot or so. If you then take it out of reverse and roll for even an inch it will not go back in. Let it continue to roll for around a foot and again it goes right in. The result is the same with or without the engine running. All forward gears operate perfectly except for the downshift issue that I described when downshifting from 3rd to 2nd (it has had that problem since I bought it).

I have also tried pumping the clutch with engine running and off. Doesn't appear to help at all when it won't go in. No sign of a clutch issue in any of the forward gears either.

I guess maybe as a next step I should verify the shifter bushing is OK and maybe drain the fluid to see if there's anything in there?

 

[WarDamnEagle]

The only other possibly pertinent information is that this truck has a backup alarm. I think that's Saudi spec but not sure if it's factory or dealer/port installed. It is still working as it always has but thought I would throw that information into the conversation.

 

[JuanJ]

Hello,

H15xF transmissions have a feedback mechanism that makes a click when you shift. In this way the transmission does not slip gears as it ages, which is the case with the H55F.

Early (1992 to 1995) models had a defect with this mechanism for the reverse gear. As per the user's manual, it was necessary to stop, press the clutch twice and then attempt to shift. This problem was corrected in the mid to late 1990s.

Removing the shifter to check is the first thing to do. Then it is trying to engage pressing the clutch pedal twice.

If all this fails, the feedback mechanism needs repair.






Juan

 

[Shyrock]

We sometimes have an issue getting into reverse. But have found when sitting if you shift into 2nd, then the shift to reverse is possible.

 

[WarDamnEagle]

Hello,

H15xF transmissions have a feedback mechanism that makes a click when you shift. In this way the transmission did not slip gears as it aged, which was the case with the H55F.

Early (1992 to 1995) models had a defect with this mechanism for the reverse gear. As per the user's manual, it was necessary to stop, press the clutch twice and then attempt to shift. This problem was corrected in the mid to late 1990s.

Removing the shifter to check is the first thing to do. Then it is trying to engage pressing the clutch pedal twice.

If all this fails, the feedback mechanism needs repair.






Juan

Well that is very interesting Juan. Thanks so much for that information! Two quick pumps and it will go into reverse most of the time (like maybe 4 out 5), which is much better than not at all (unless slowly rolling). I still haven't removed the shifter to check the bushing but will at some point.

So I assume this "feedback mechanism" is internal to the transmission and if a competent person were to fix my synchro problem with 3rd to 2nd that it would be easy enough to fix this mechanism? In looking at the parts diagrams, there is a reverse synchronizer on the Transmission Gear diagram and all these Gear Shift Fork and Lever parts on a separate diagram. Is it one of these?

33211	FORK, REVERSE SHIFT
33211-60040		1
33212A	FORK, GEAR SHIFT, NO.1
33212-60040		1
33213B	BOLT(FOR SHIFT FORK SET)
90105-08211		3
33213G	FORK, GEAR SHIFT, NO.2
33213-60060		1
33214G	FORK, GEAR SHIFT, NO.3
33214-60040		1
33231	HEAD, REVERSE SHIFT
33231-60020		1
33231E	BOLT(FOR REVERSE SHIFT HEAD)
90105-07001		1
33242	SHAFT, GEAR SHIFT FORK, NO.1
33242-60040		1
33243A	SHAFT, GEAR SHIFT FORK, NO.2
33243-60081		1
33244B	RING, SHAFT SNAP (FOR SHIFT FORK SHAFT)
90520-16003		2
33244D	SHAFT, GEAR SHIFT FORK, NO.3
33244-60030		1
33245D	RING, SHAFT SNAP (FOR 3RD & 4TH SHIFT FORK SHAFT)
90520-14003		2
33245G	SHAFT, GEAR SHIFT FORK, NO.4
33245-60040		1
33261C	SHAFT, SHIFT & SELECT LEVER
33261-60040		1
33264	PIN, OR BALL, SHIFT INTER LOCK, NO.1
90250-10023	L=15.45	2
33264B	ROLLER, NO.1 (FOR SHIFT INTER LOCK )
90361-10003	L=13.6, OD=9.5	1
33264C	BALL (FOR SHIFT INTER LOCK)
90360-10003		2
33265	PIN, SHIFT INTER LOCK, NO.2
90250-10024	L=56.95, OD=9.53	1
33275A	SPRING, COMPRESSION (FOR SHIFT DETENT BALL LOW SIDE)
90501-14124	L=26.3	4
33275B	BALL, SHAFT DETENT
90360-10003		4
33275F	PLUG (FOR SHIFT DETENT BALL)
90341-12008		4
33280	PIN ASSY, REVERSE RESTRICT
33280-60020	RH	1
33280-60030	LH	1
33280E	PIN, SLOTTED SPRING (FOR REVERSE RESTRICT PIN)
90254-04015		1
33283	PIN, REVERSE RESTRICT, NO.1
33283-60030		1
33283A	SPRING, COMPRESSION (FOR REVERSE RESTRICT PIN)
90508-10064		1
33283D	PLUG (FOR REVERSE RESTRICT PIN)
96411-41200		1
33283G	PIN, SLOTTED SPRING (FOR REVERSE RESTRICT PIN)
90254-05016

We sometimes have an issue getting into reverse. But have found when sitting if you shift into 2nd, then the shift to reverse is possible.

Thanks for that tip. Unfortunately that doesn't seem to help in my case.

 

[JuanJ]

Hello,

The feedback mechanism is described as "triple cone type synchromesh" by Toyota. Yes, it is internal, and the reverse gear part is different from the other gears.

The input shaft includes first gear, second gear and reverse.

The reverse gear uses a sliding mesh. The part number is 33381-60010.

The FSM states that it is necessary to check clearances for both gears and forks and replace them if they are out of specification.

I am not an expert on transmissions but I think that a good mechanic can do this.

Hope this helps.





Juan

 

[WarDamnEagle]

Hello,

The feedback mechanism is described as "triple cone type synchromesh" by Toyota. Yes, it is internal, and the reverse gear part is different from the other gears.

The input shaft includes first gear, second gear and reverse.

The reverse gear uses a sliding mesh. The part number is 33381-60010.

The FSM states that it is necessary to check clearances for both gears and forks and replace them if they are out of specification.

I am not an expert on transmissions but I think that a good mechanic can do this.

Hope this helps.





Juan

Again, very helpful. Part is around $55 but has to come from outside the US or at least outside the US dealer network. Given my issue downshifting from 3rd to 2nd, I probably should get an expert to go through the entire transmission. At least I can drive it with a bit more confidence now that I can somewhat reliably get it into reverse.

 

[rick_d]

or buy a h152 from a US dealer....
$1,000 to dive into a used transmission here and at discount the h152's can be $2,500.

 

[WarDamnEagle]

or buy a h152 from a US dealer....
$1,000 to dive into a used transmission here and at discount the h152's can be $2,500.

Is an H152 a drop in replacement for an H150f in all regards? I spent a few minutes poking around the interwebs but couldn't find a definitive answer. Maybe @OGBeno knows?

 

[OGBeno]

Is an H152 a drop in replacement for an H150f in all regards? I spent a few minutes poking around the interwebs but couldn't find a definitive answer. Maybe @OGBeno knows?

It is not. Input shaft would need to be changed out.

 

[JuanJ]

Again, very helpful. Part is around $55 but has to come from outside the US or at least outside the US dealer network. Given my issue downshifting from 3rd to 2nd, I probably should get an expert to go through the entire transmission. At least I can drive it with a bit more confidence now that I can somewhat reliably get it into reverse.

Hello,

H15xF transmissions were built to be repaired.

Some do not like the click when shifting but it is better than slipping gears in my book.





Juan

 

[WarDamnEagle]

Hello,

H15xF transmissions were built to be repaired.

Some do not like the click when shifting but it is better than slipping gears in my book.





Juan

It shifts pretty smoothly when going from 1 to 5 or downshifting from 5 to 4 to 3. No complaints about that at all.