4.6L WITH TR3650 MANUAL TRANSMISSION - CLASH OR RASPY FEEL - SHIFTING INTO 2ND AND/OR 3RD GEAR
Publication Date: September 23, 2009
This article supersedes TSB 9-9-6 to update the Service Procedure.
Some 2007-2008 Mustang vehicles equipped with the 4.6L engine and TR3650 5 speed manual transmission may exhibit a clash noise and/or raspy (rough) feel on gear engagements during 1-2 or 2-3 upshifts. This condition may be more pronounced when the transmission is colder than 40 degrees F (4 degrees C).
Follow the Service Procedure steps to correct the condition.
A lack of shift effort may cause gear clash when shifting a manual transmission. Increased shift effort in colder temperatures is a normal characteristic.
Inspect clutch pedal for full travel. Verify that the floor mat is properly secured to the carpet hook.
Clutch pedal does not have full travel - Do not continue with this procedure if the floor mat is not properly secured, positioned, or other obstructions are present.
Clutch pedal does have full travel - If no conditions are present proceed to Step 2.
FULL CLUTCH PEDAL TRAVEL IS REQUIRED TO RELEASE THE CLUTCH AND ALLOW PROPER SHIFTING OF THE TRANSMISSION.
Remove the transmission following Workshop Manual (WSM), Section 308-03B.
Only replace the synchronizer that exhibits the shift concern. Follow WSM, Section 308-03B to replace the 1-2 and/or 3-4 synchronizer assembly and blocking rings as required.
Install the transmission following WSM, Section 308-03B.
1-2 Blocking Ring
3, 4, 5 And Reverse Blocking Ring
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
2007-2008 Mustang 4.6L Engine TR3650 Transmission: Replace The Necessary Synchronizer(s) And Blocking Rings As Required (Do Not Use With Any Other Labor Operations)