TH350 rebuild tech
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| − | + | This WIKI is not intended to be a replacement for an ATSG or Ron Sessions tech manual. First time builders will likely need a tech manual. I would recommend Ron Sessions book "TH350 Handbook" in the HP Book Series. It has good pictures, alot of good info, but has some outdated info. Outstanding value for the money. | |
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| − | This is | + | This is not a step-by step pictorial, don't assume I have shown where every part goes, there will be some thrust washers not illustrated that were installed and not taken an individual picture to show it because of bandwidth considerations. |
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That said I hope this helps some understand the TH350 or maybe it'll help when you're elbow deep and have a question. | That said I hope this helps some understand the TH350 or maybe it'll help when you're elbow deep and have a question. | ||
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Once the case has been cleaned, all threads checked and or repaired, and the rear case bushing installed you can start assembly. | Once the case has been cleaned, all threads checked and or repaired, and the rear case bushing installed you can start assembly. | ||
| − | The first item to go in | + | |
| − | Its function is for oil to force it towards the front or | + | The first item to go in the case will be the low/reverse apply piston. |
| + | Its function is for oil to force it towards the front or bell housing side of the trans, applying the low/reverse clutches. This allows reverse when applied simultaneously with the direct (high gear) clutches, and allows manual low gear when applied with the forward clutches. Manual low gear creates engine braking on deceleration. The low/reverse clutches do not apply in automatic range 1st gear. The low sprag (low roller clutch actually) causes first gear when only the forward clutches are applied. | ||
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In the rare application that does not need reverse or low gear engine braking the low piston and low clutches can be deleted, and the feed holes in the case blocked. | In the rare application that does not need reverse or low gear engine braking the low piston and low clutches can be deleted, and the feed holes in the case blocked. | ||
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