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Products
Boost Valve Kit Sonnax 4L80E 4L85E MT1 MN8
5.0 / 5.0
1 Review
Boost Valve Kit 4L80-E, 4L85-E From Sonnax Compatible with '91-later units featuring a factory-style sleeve (no O-rings). Can also be retrofitted t...
View full detailsSure Cure Kit Sonnax 4L80E 4L85E
Sonnax Sure Cure Kit for 4L80E And 4L85E Rebuild with confidence and stop "comebacks" with the Sonnax Sure Cure Kit (SC-4L80E). The 4L80E is a heav...
View full detailsTCC Regulator Valve Kit Sonnax 4L80E 4L85E
5.0 / 5.0
1 Review
Sonnax TCC Regulator Valve Kit for 4L80E and 4L85E Transmissions GM vehicles equipped with 4L80-E and 4L85-E transmissions may experience issues su...
View full details1st-2nd And 2nd-3rd Shift Valve Spring Kit Sonnax 4L80E 4L85E
5.0 / 5.0
1 Review
Sonnax 1-2 And 2-3 Shift Valve Spring Kit for 4L80-E, 4L85-E In GM 4L80-E and 4L85-E transmissions, proper 4th gear operation relies on signal A oi...
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