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How smooth are these R50 transmissions supposed to shift?


PrecisionX
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I was curious to know what to expect for transmission performance out of a 3.5L R50? Coming from an E46 BMW automatic transmission that was essentially seemless I drove one that was for sale for a friend who's looking but three states over, he asked me to test drive the R50 and it seems a bit rough around the edges. Potent shift from 1st to 2nd, sluggish to third and smoother to 4th. The rpms don't jump when changing just seems to hold for a second before it shifts. Might be completely normal?

I'm OCD about this stuff, if overdrive is off and I stomp on it, seems to be fine, same when overdrive is on. It just seemed slow going to third around town (30mph speed limit). Any thoughts? I don't want to have him buy a bad one

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I have the 3.3L but I'm presuming it's the same tranny. Mine shifts a little hard from 1st to 2nd especially when it's cold, but all the other shifts are smooth & no hesitation.

 

An E46 BMW transmission it certainly is not. :tongue:

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1->2 is characteristically rough with our RE4R01A transmission. 2->3 can be a little slow.

 

As long as the transmission fluid has been maintained and it looks bright red on the dipstick, it should be in good condition.

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If the truck is fairly local to you. Ask the seller to accompany you to a shop so you can have it checked out. Most transmission shops will do that for you. Some charge a fee, some may want a appointment.

Can also see what the local dealership might charge for a vehicle inspection. I know that my local dealer pretty much charges at least $100 to do pretty much anything. But you might have better luck.

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From what I've heard, a hard 1-2 shift and a slower 2-3 shift is normal for these. Mine does it too, I wouldn't worry about it. I would however ask if the 3.5 engine is burning oil. My dad's 03 uses a quart or two between oil changes and from what I've read, the issue is not uncommon.

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That sounds about like what mine does. 2x for checking into the oil isse. Also, my cousin had a 02 for a while and on a trip up to the mountains he had a cylinder fill with oil. Not saying thats common just somehting to ask about.

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That's about where my tranny is, I'm not a huge fan of the way it shifts but that's about normal: 1-2 is hard, especially when cold, 3-4 smoother and downshifting from 4-3 is a little rough at all times.

 

I'm getting the tranny flushed, we'll see if there's any change. I get the feeling the tranny is what holds back the power...I can't complain too much though, it's just not up to some of my other frequent drivers.

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Coming from an E46 BMW automatic transmission that was essentially seemless I drove one that was for sale for a friend who's looking but three states over, he asked me to test drive the R50 and it seems a bit rough around the edges.

 

BMW automatics are sourced from GM.

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