I have one; will check and get back in a few days (still on my trip)
SQOD Squad - Stupid Question Of the Day (5 Viewers)
- Thread starter JamesC
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nwfl4runner
GOLD Star
Only lines you’ll need to change are the 2 from the frame to the rear axle
It depends on what you mean by jerks/jumps. Using cruise control under those circumstances will definitely cause transmission shifting multiple times. A full load like that at 80+ mph going up an incline will kick down a gear or even 2 when using cruise. I’m not a fan of the programming Toyota uses for cruise control. Maybe what you feel is a downshift to 6th. That would give you a jerk/jump feel. Next time it happens watch the tach and see what’s going on with the rpm. A really big jump in rpm will mean a really big downshift. That jump might be normal using cruise.
I’ve notice with cruise control, if you’re 80+ and need to shift to 4th, it jumps right back to 5th. It does the same thing with 3rd gear and 60+. I think it’s a problem with Toyota’s cruise control programming and not a transmission malfunction.
Ah, I didn't understand that this behavior was with the use of cruise control? If so, disregard my comments and I'll defer to others that have the 8-speed.
as pointed out in another post, I’m also on oversized tires which may monkey with the tranny’s ecu. But, if your situation only occurs when using cruise control, you’re not alone.
I should add to my previous post that next time it happens, experiment with driving yourself and not using cruise control. I found the transmission to be extremely smooth with down/up shifts that are appropriately timed when not using cruise up/down hills when loaded. I’m especially frustrated with the cruise going downhill when the transmission will abruptly downshift to use engine braking. It’s like the programming can’t stand to have even 1/4 mph change in speed.
Today I was on 58 west from Barstow to Bakersfield CA; it’s mostly flat with some gentle slopes but with gusty headwinds and I have a loaded megawarrior. The road is mostly empty, perfect for me to spare some attention on this.
What I observed is that with an almost constant 85 mph on cruise control, the engine is very discretely at 1.8k, 2.4k, 3k, 3.6k and 4.2k rpm. It will generally hold at these rpms depending on the grade and headwinds. But the jump from 3k to 3.6k is always and the only one that’s jerking.
On manual driving it is generally smooth, but depending on how “lightfoot-ed” I was, the jump from 3->3.2k, sometimes 3.2->3.4k, or sometimes 3->3.4k is still noticeable.
What I observed is that with an almost constant 85 mph on cruise control, the engine is very discretely at 1.8k, 2.4k, 3k, 3.6k and 4.2k rpm. It will generally hold at these rpms depending on the grade and headwinds. But the jump from 3k to 3.6k is always and the only one that’s jerking.
On manual driving it is generally smooth, but depending on how “lightfoot-ed” I was, the jump from 3->3.2k, sometimes 3.2->3.4k, or sometimes 3->3.4k is still noticeable.
After losing all power Friday morning, I discovered the red lead that feeds my power to the rear of the truck disconnected from its fuse. Physical connection simply failed. I've removed both leads for the time being, so no compressor in the back for the time being. The SQOD: Is there a 'thread of record ' for clean wiring up of auxiliary bits, lights, rear power, and so on that you would recommend? Something like 'this is what I would have done the first time, had I known better.' (kind of like the CDL/4lo actuator thread @TeCKis300 started) Assume addition of a switchpros type of product. TYIA
(Yes, I've searched, but nothing felt definitive, or as close to definitive as is possible on Mud)
(Yes, I've searched, but nothing felt definitive, or as close to definitive as is possible on Mud)
I'm not sure there is one as well. This thread is focused on Switchpros integration, but may have some of what you're looking for?
Switch Panel / Switchpros Install Underhood Tap Points
Lots of people have installed these but I couldn't find a good reference as to where to tap for various things underhood. Here's my attempt to document some of the more common taps and triggers. Including a much wanted stock fog light override function. I'm using a 1/4" gland fitting to route...
forum.ih8mud.com
When you say physical connection failed, is that a crimp, set screw, or some other method? Lack of strain relief? Overloaded connection overheating? If you can show pics, might be able to help.
This is interesting info. From the numbers, in manual driving it looks like you’re seeing something noticeable when the torque converter unlocks and kicks the rpm up about 200. The same effect when on cruise, but adding a gear shift for a an rpm change of about 600. I can’t think of what might cause this unlocking jerk at only about 3000 rpm. You mentioned fluid change. Are you confident you got the fluid level right? I’ll double check the behavior of mine to see if I can feel anything at a 3000 rpm unlock.
Slight drama, but I think I followed the guide with reasonable confidence.
TLC2013
SILVER Star
I just did a drain and fill of the pan and took a couple shots of the overflow and the fill plug.
Slow paddler has the 8 speed.
Slow Paddler
SILVER Star
Correct. I haven't had the chance to crawl under yet and look for the fill fitting. Gonna me mid-90s all week here in northern Ohio, and we're gone next week, so it'll be a while before I get to it. Thanks for the photos, though, @TLC2013
Thank you.I'm not sure there is one as well. This thread is focused on Switchpros integration, but may have some of what you're looking for?
Switch Panel / Switchpros Install Underhood Tap Points
Lots of people have installed these but I couldn't find a good reference as to where to tap for various things underhood. Here's my attempt to document some of the more common taps and triggers. Including a much wanted stock fog light override function. I'm using a 1/4" gland fitting to route...
When you say physical connection failed, is that a crimp, set screw, or some other method? Lack of strain relief? Overloaded connection overheating? If you can show pics, might be able to help.
I'm pretty sure it's a screw set on the hot side, which simply let go of the giant power cable that runs to the back of the truck...on the exterior. Everything is already too hot to touch today, so I'll take the electrical tape off and snap a pic tomorrow.
Approx how many quarts were you able to drain and fill? I wanna do this soon, just need to know how many to buy.
TLC2013
SILVER Star
I did 4 quarts out of the pan and into a large measuring cup/bottle. Then replaced that fluid with a one gallon jug of the Amsoil SS ATF. I had warmed up the car and the pan temp was reading over 155F at the time I pulled the drain plug. I put the drain plug back in at 4 quart mark. The fluid was still slowly coming out.
Does anyone know what this is? Yeah, I know, I need to take a better picture so I can read the text on it. Could it be an aftermarket mount for a dash cam?
