[SlowE92]

Transmission will not go into D, it goes into m2 for some reason. When i pull it over to sport mode it wont upshift. Noticed this today could this be a contributing factor?

[konstat]

I’d think lack of fluid flow to the valve body could possibly do that. Could you also check trans fluid level?

Can you link any event to when it started happening? Were you doing work in the area of that line before it started happening? Any codes?

[SlowE92]

All i did was change the fluid i havent checked the trans fluid level, tbh i didnt know we could do that. I had a old transmission that would not engage reverse and it did the same thing when put into drive. I swapped it out for a new one and now the reverse works but the drive issue still persists. I straightened out that shifter rod and it didnt do anything so im thinking i might just need a new shifter. But im not sure

[konstat]

Originally Posted by SlowE92

All i did was change the fluid i havent checked the trans fluid level, tbh i didnt know we could do that. I had a old transmission that would not engage reverse and it did the same thing when put into drive. I swapped it out for a new one and now the reverse works but the drive issue still persists. I straightened out that shifter rod and it didnt do anything so im thinking i might just need a new shifter. But im not sure

To check fluid level you need to start car, pull fill plug, and then warm up the trans fluid to 40 deg C. Inspect fill hole for a small stream of fluid coming out. If it doesn’t then your fluid level is too low.

Put fill plug back in then turn off car and wait for car to cool down. Start car again remove fill plug and fill with about half a liter. Let fluid drain out until fluid temp is 40C and put fill plug back in. You’ll notice a small stream which is exactly what you want.

I thought you mentioned in the other thread that you replaced the shifter with a new one?

Since you said you coded the TCM with the swap I’m assuming you’re using the TCM that came with the new transmission and not the old one?

[SlowE92]

Originally Posted by konstat

To check fluid level you need to start car, pull fill plug, and then warm up the trans fluid to 40 deg C. Inspect fill hole for a small stream of fluid coming out. If it doesn’t then your fluid level is too low.

Put fill plug back in then turn off car and wait for car to cool down. Start car again remove fill plug and fill with about half a liter. Let fluid drain out until fluid temp is 40C and put fill plug back in. You’ll notice a small stream which is exactly what you want.

I thought you mentioned in the other thread that you replaced the shifter with a new one?

Since you said you coded the TCM with the swap I’m assuming you’re using the TCM that came with the new transmission and not the old one?

Yeah unfortunately this is the shifter that i had, i bought a different one off facebook market place but to no avail. And yes im using the new TCM that came with the new transmission. But the same issue still persists with changing it out.

[konstat]

That’s pretty wild it sounds like you have all new hardware. I’m wondering if there’s an electrical issue with your car somewhere. The only thing I can think of at this point is the TCM wire harness.

[SlowE92]

Originally Posted by konstat

That’s pretty wild it sounds like you have all new hardware. I’m wondering if there’s an electrical issue with your car somewhere. The only thing I can think of at this point is the TCM wire harness.

Yeah im going to change out the wire harness and see if that does anything, its pretty cheap so im not too worried about it. Ive removed the jb4, xhp flash, took off the bef and flashed the stock map through mhd and this issue still persists unfortunately. Something else i noticed is my battery is low voltage, it does not reach above 13.2v when the car is running and it dips below 12 when the car is off. Im going to sht a chicken if this whole time its been a bad battery so im going to order a new one. I just never took it into account bevause the car starts up just fine no long cranks or anything.

[SlowE92]

Originally Posted by SlowE92

Yeah im going to change out the wire harness and see if that does anything, its pretty cheap so im not too worried about it. Ive removed the jb4, xhp flash, took off the bef and flashed the stock map through mhd and this issue still persists unfortunately. Something else i noticed is my battery is low voltage, it does not reach above 13.2v when the car is running and it dips below 12 when the car is off. Im going to sht a chicken if this whole time its been a bad battery so im going to order a new one. I just never took it into account bevause the car starts up just fine no long cranks or anything.

Originally Posted by konstat

That’s pretty wild it sounds like you have all new hardware. I’m wondering if there’s an electrical issue with your car somewhere. The only thing I can think of at this point is the TCM wire harness.

I also need to order that diagnostic tool you mentioned before. Im somewhat new to these bmw’s still, i had an r35 previously, so tackling all of these repairs have been a sht show for me.