Fitting 35’s with minimal trimming NOW ADDING LONG TRAVEL AND 934 CV’s

Supply chain shortages on raw materials. Just like everything else. Where have you been?

 

Under a rock duh

 

I mean it is entirely possible the trans is hurt too. Beadlocks aren’t light nor are 35’s. That trans has been working like a dog to keep up and that’s not necessarily good.

 

Thanks guys. It’s typically when it’s cold from 3rd to 4th when I am easy on the throttle. If I am hard on the throttle or after it warms up from driving around a little it doesn’t do it. If I shift manually and don’t put it in overdrive it doesn’t do it. So I feel like it’s something weird with the shift points. I’ll have to change the gears first and see how it reacts. Then if I still have issues I will contact @JustDSM

 

I just went to 35s (315s) from 265s about 2 weeks ago and have not experienced the shifting issues. So maybe try the ATF as mentioned above? I do have gears on the way (YEAH!!) so looking forward to getting some pep back, and could probably use some better brakes, but overall the trans/shifting seemed pretty normal. I finally hit the dirt Saturday so I'll see what else I need to cut/hammer ...

 

Yeah that’s possible. I feel like if was that though it would happen more throughout driving and not be such a specific issue you know?

 

I have flushed my transmission twice, once when I bought it at 70k and recently at 105k after experiencing the issue. I do my drain and fills every 15k with my diffs. Probably overkill but I’m a believer overkill for maintenance. I have pulled quite a bit of trailers on my 33’s. Once across the country and back. But if the transmission took a dump on me I’d be pretty disappointed at 105k with the quality that toyota supposedly built a reputation for.

 

I don’t understand the whole big tires and no gears thing. Honestly mine being a 6spd should give it a solid edge over an auto. I HATED how sluggish it was even on 33’s and stock gears. Gears do so damn much. From making the truck work less, to better off-road abilities to better fuel economy. Should be step number one before tires/wheels.

 

Yeah I’ll own that mistake. It does drive pretty terrible with 35’s on stock gears. Gears are definitely on my urgent list

 

Just put the shifter in 4th and leave it there. When you put it in drive the trans hunts way more trying to optimize MPG

 

After driving my f150 with normal tires and stock gearing it became immediately clear just how dumb the taco trans is at shifting with 35’s and 4.88’s. It’s probably been that way it’s whole life but I haven’t had stock size tires in about ten years so who knows. Gears are a must, but shifting at higher rpm would be nice, too. I like being able to do that in the f150 with the sport/haul mode.

 

Life is fine on 35s and 4.88s. The transmission/ECU needs to be tuned. Bully dog has a decent tune for trans (came with the supercharger) and I now run a custom tune which is even better from @JustDSM. Shifts are quicker, holds gears and does not hunt.

 

I gotta drain and fill my break in fluid. 4.88 so far feels much better. I averaged 16-17ish mpg over the break in. The boost in mpg was definitely a up side.

 

From my understanding, your problem is called "shift flare" and is entirely normal on the A750 auto trans in our trucks...to a point. When you've altered the OEM parameters, you gotta make the proper adjustments. A tranny tune from Justin (justDSM) is a great starting point but there's every reason in the world to get those 3.73 gears outta there on 35's!

 

No doubt! When I keep mine around 60mph (speed limit here is 55) I’ll pull 17 on 37’s. Not like MPG’s should be a huge concern with these things but it is nice.

 

I think it's less about mpg but miles per tank, if I can go farther on a single fill up it's a win.

 

When I was on 33’s and stock gearing I usually pulled 240-250 on a tank. I’ve seen 280 on an all highway trip with the 37’s minding my RPM’s. That’s filling up before the light.

 

Yeah speed limits here in Utah are 80 and cars are going like 90. I’m doing 70 with the semi’s thinking like damn I feel slow.

 

I wish I could get that on my truck. I just did 4.56's on 33's and typically cruise a 2k going 70 on the way to and from work. I'm lucky to get 14 mpg with minimal extra weight.

 

Lol I ended up pulling one of those off the grid rental tear drop trailers back to SoCal from one of the Moab trips through TW. Friend was having truck issues and didn’t want late fees. So odd to see semi trucks pass me at 80 while I’m trying to lug up a grade.