morlme Posted July 15, 2020 Share Posted July 15, 2020 Sometimes when I I press D it feels like truck is not going into gear. The lightning bolt comes on and once I press fuel pedal it goes into gear hard. Like as if there’s no clutch brake. Some times when hooked to lap top it says clutch slipping. After driving some time the lightning bolt goes out and it goes into gear normal and smooth. Also I cannot switch from N1 to N2 when lightning bolt is on. 12 speed has anyone experienced this before? thanks in advance Quote Link to comment Share on other sites More sharing options...
fjh Posted July 15, 2020 Share Posted July 15, 2020 (edited) Its likley the clutch actuator is leaking down and is not operating the clutch properly Either a leaking hose or or the bellows has a hole!either way its pricey! and you likey have to take it to a dealer! Edited July 15, 2020 by fjh Quote Link to comment Share on other sites More sharing options...
morlme Posted July 15, 2020 Author Share Posted July 15, 2020 It will leak all air in trans if parked for a few days. I already changed the air fitting on top of trans to air tank. Can’t find any other leak... Quote Link to comment Share on other sites More sharing options...
fjh Posted July 15, 2020 Share Posted July 15, 2020 the problem is likely inside the bell housing Quote Link to comment Share on other sites More sharing options...
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